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GRK 01105
The GRK R4 Multi-Purpose Wood Screw is a professional-grade structural fastener designed for framing, decking, and construction projects. These premium screws deliver superior performance in both interior and exterior applications, including deck building, fencing, and general carpentry. GRK’s Climatek™ coating, provides exceptional corrosion resistance, making these construction screws ideal for pressure-treated lumber, cedar, and all other wood applications. The patented Fast Bite Tip and Zip-Tip™ technology eliminates the need for pilot holes, while the W-Cut™ design ensures smooth, low-torque driving in all wood types. ICC-ES ESR-3201 approved for structural applications, these self-drilling screws are trusted by professional builders and DIYers alike. The star drive head with 6-points of contact prevents cam out and head stripping, making these wood screws the choice for demanding construction and home improvement projects.
•Professional-Grade Multi-Purpose Construction Screw: Code-approved fastener (ESR-3201) for structural framing, decking, fencing, and interior/exterior applications
•Superior Installation Speed: Features Fast Bite Tip and Zip-Tip™ self tapping technology that eliminates pre-drilling, while W-Cut™ coarse thread design ensures low-torque, faster driving
•Advanced Corrosion Protection: rust resistant Climatek™ coating provides exceptional durability for outdoor use and in pressure-treated lumber applications
•Precision Engineering: Star/Torx drive recess with 6 points of contact prevents stripping, while CEE Thread™ technology reduces wood splitting
•Professional Quality: Precision-fit design minimizes wobble between screws and bits, increasing productivity and ensuring reliable performance every time
The GRK R4 Multi-Purpose Wood Screw is a professional-grade structural fastener designed for framing, decking, and construction projects. These premium screws deliver superior performance in both interior and exterior applications, including deck building, fencing, and general carpentry. GRK’s Climatek™ coating, provides exceptional corrosion resistance, making these construction screws ideal for pressure-treated lumber, cedar, and all other wood applications. The patented Fast Bite Tip and Zip-Tip™ technology eliminates the need for pilot holes, while the W-Cut™ design ensures smooth, low-torque driving in all wood types. ICC-ES ESR-3201 approved for structural applications, these self-drilling screws are trusted by professional builders and DIYers alike. The star drive head with 6-points of contact prevents cam out and head stripping, making these wood screws the choice for demanding construction and home improvement projects.
I tend to use these in construction everywhere. Sure, they are more expensive than a simple Phillips head, but they are SO much more durable. Faster to use, great holding power. Torx, star drive, is so much better than any other drive.
A contractor friend convinced me that starbit screws were the way to go as I was getting ready to build an addition.I had been using phillips deck screws all my life up until purchasing these.(He uses the Home depot brand, I should have followed his lead.)In preparation, I bought a new impact style driver.Knowing how often I lose phillips tips, I decided to load up on them.Just about every major tool brand has their own starbits for sale.Not knowing who the winner would be, I ordered some from Dewalt, some from Bosch, Milwaukee, and a few others.The ad says each box comes with a bit.Out of all the bits I have tried, the GRK is the absolute worst fit of all.Next, the points leave something to be desired.Most times when driving these, the screw just spins and spins, and feels like it's going to take forever before it gets a bite in the wood.Home depots Deckmate screws are far superior to these in strength as well as a much better start and bite.I purchased a number of boxes of GRX in varying lengths.Then I tried the deckmate, in retrospect, I wish I hadn't spent my money on these.I'm sure I'll use them for something, but at this point I'm rather disappointed that they don't live up to the hype.
I used the 3 1/8” and 2 1/2” screws to frame my basement. These screws are excellent. None stripped out and all fastened quickly and easily. I believe they were worth the extra cost versus cheaper (but more frustrating) fasteners. Torx is the best and outperforms all other head types.
These are the BEST screws. I use them for everything and they go into wood so easily! I ran out and was restocking my tool closet supply! Buy them in multiple lengths for different types of projects!
These are great screws, with the torx head they rarely strip and they self tap so you don't need to predrill the holes unless you are using a harder wood.
Really good product. It seems a bit expensive but if you compare the price by unit with other products on the market you'll find the are not and these do a better job when drilling. I used them to build an overhead garage shelving out of 2 by 4s and got really good results.
Great screws. We use these and the Grip-Rite version on my framing crew for most anything that will need to come apart such as bracing or mock-ups. These GRK's start easier and bury easier but the Grip Rite version is not only less expensive, but also stand up to being re-used multiple times better than the GRK's. The heads will cam out after a couple uses with these.
Great screws. Used them for simple carpentry work. Replacement for home depots phillips gold screws. I think I read the phillips screw was invented in 1940. Well these are the modern upgrade. Go in great with T25 bit. I have used 100's of these in my current project and have not stripped a bit. Try'm you'll like'm. Oh, and GRK is a great brand.
UPDATE:After a few months I had to remove some deck boards and was horrified to find some of the GRK screws had broken. Not nearly as many as with the TrapEase screws, but is it really so hard to make screws that won't break? The end of one board completely popped up because both its GRK screws broke.What's worse is I had a leak around my wood-clad chimney and used GRK screws to hold plastic under the 2" wood trim boards as a temporary fix. When I removed the plastic less than 2 months later, a few of the GRK screws had broken. These screws should not have been under any stress and were holding 2x1" trim boards and driven into former nail holes so why the heck did they break? I used other GRK screws to clamp plastic between two 2x6 boards, driving one screw every 6" or so without pre-drilling, and about 10% of them were broken when I went to remove them. I can only guess they broke during driving due to lack of pre-drilling. Considering these screws have special tips that are supposed to prevent the need for pre-drilling, having 10% break without pre-drilling is ridiculous given the high cost of these screws.ORIGINAL 5-STAR REVIEW:The description doesn't say it, but these screw packs do come with a green-colored, 1" long, T25 torx bit for 1/4" hex drivers.My neighbor gave me 300 or so FastenMaster FMTR9003-1750GY 3-Inch TrapEase I Composite Deck Screw, Gray, 1750-Pack screws he had left over. He used to be in construction and used these composite decking screws in his regular wood deck because he believes the concave underside of the screw head will hold the wood together and lessen splitting. It actually seems to be true. I've been comparing the TrapEase to these similarly-priced GRK screws and have noticed the GRK screws will drive a split wider than the TrapEase. It appears that the concave underside of the TrapEase actually holds the split together. Unfortunately, I found that when removing the TrapEase screws many months later, the tighter threading near the top, meant to pull down composite deck boards, will pull a board up faster than the tip of the screw unscrews, lifting the board until the tighter threading slips free and tearing splinters out of weaker boards. About 1 in 20 screws I removed caused large chunks of the wood to break out along the grain, and many more suffered lesser damage. I think this negates any benefit the mushroom head of the screw might have for preventing splitting. Note that I didn't get this splintering effect when I removed recently-installed TrapEase screws, I assume because the wood hadn't expanded/settled around the tighter threads at the top.The GRK screws are also supposed to reduce splitting because the undersides of their heads have little teeth and pockets that cut/grind a hole for the head. The GRK heads do cut a clean hole but sometimes split the board anyway. If I see a board start to split, I can back the GRK screw out, blow away the sawdust in the hole, and drive the screw back where it was to reduce the split so it hopefully won't get worse. My boards are old so maybe a newer board wouldn't split. I actually found a YouTube video where they drove a GRK screw all the way through a 4" block of wood and into another piece of wood using the cutting action of the GRK screw head. I don't have a 4" scrap wood block but I did a test on a scrap 2x4 and drove the GRK screw in half an inch below the surface of the wood. In that test it left a nice clean hole around the head and caused no splitting even though I was about 1.5" from the end of the board.GRK screws are stronger, maybe even twice as strong but my sample size and testing method is too limited to be sure. I tested bending two #9 TrapEase screws and one broke in two when the screw was at about a 160 degree angle while the other one made it to about 100 degrees. A #9 GRK made it to about 20 degrees before it broke, and even then it was still hanging on by a half millimetre bit of metal. I should test a second GRK for comparison but I don't want to sacrifice another... I've driven about 150 TrapEase screws into regular wood and had the head break off one. Never had a GRK screw break with over twice as many driven. After a single light winter, 23.2% (36 out of 155) of the TrapEase screws had broken while all the GRK screws were fine. I discovered that GRK makes GRK KAM9318-5R Kameleon ProPak 9 by 3-1/8-Inch Composite Deck Screws, 375 Screws per Pail, Redwood that have a head style similar to the TrapEase, so that's probably a better option for strength, but I still don't think they should be used in real wood.Another reason I don't expect problems with the GRK screws is they drive about twice as fast as the TrapEase. My impact driver switches to slower impact mode because the TrapEase gets too tight when it's about 50%-75% in the wood. Just about every GRK zips in at full speed and only switches to impact mode when the actual screw head touches the wood. So even if GRK wasn't stronger, it's not as likely to break during driving simply because it's not so tight in the wood. I think the tightness of the TrapEase is caused by the threads at the top having a different pitch and thus trying to pull faster into the wood, which pulls the wood down but creates tightness around the screw and more strain on the screw.GRK's anti-corrosion coating seems slightly more durable. Driving a GRK fully into a 2" thick piece of wood (not pre-drilled) and then removing it left more of the coating on the screw than doing the same with a TrapEase screw, but there wasn't much difference except in the tip of the TrapEase which had lost probably three times as much coating (about 8mm worth). I also noticed the TrapEase was way too hot to touch after removing it whereas the GRK was merely warm, another indication that TrapEase screws have much higher friction with the wood (maybe something to do with their coating?). With less friction I would imagine more of GRK's coating survives undamaged after driving the screw.The square drive heads on the TrapEase work well but the Torx heads on GRK are better for preventing stripping and the torx bits last longer. I've also had more problems with the driver skipping out of the square drive heads than skipping out of Torx heads.For those who don't think screw strength matters, I've got 1800 screws to replace with about 30% of them being broken on the lower deck (where the paint hasn't started flaking) and closer to 50% broken on the upper deck. I don't know what brand the screws are since they were installed by the previous home owner, but they aren't labelled or marked and have no identifying features other than they're square drive. I need to get the broken screws out because I can't countersink them to grind the paint off the deck with a Paint Shaver Pro (highly recommended if you ever need to strip paint). I have yet to get a screw remover to work after two hours of trying various techniques, so I can't replace the broken screws with new ones. Instead, I've had to drill at an angle to avoid the broken part of the screw such that the new screw's head ends up about where the old screw head was. Unfortunately this creates a second path for water to get into the joist and accelerates dryrot (yes, dryrot is ironically caused by moisture). Dryrot takes a long time to repair and requires expensive wood hardener and epoxy wood, or replacement of a whole joist, so it's really something to do whatever you can to avoid.So do yourself a favor and spend more for stronger screws like these GRKs. I did a lot of searching through forums and GRKs are mentioned the most as being strong and fast to drive. I couldn't find any other brand with consistently-good mentions, but Deck Mate probably came the closest. Deck Mate is actually a Home Depot brand name and they've used the "Deck Mate" name on screws of varying quality and style over the years so I think using them is taking a risk.
