GRK 25133 Pheinox R4 #10 by 2-1/2-Inch Bulk Box Screw, 2500 Pieces Per Box

GRK 25133

•R4 Bit Table #4 uses T-10, #6 and #8 use T-15, #9, #10 and #12 all use T-25
•Self-tapping
•Self-tapping countersink head
•W-cut thread design

GRK 25133

GRK R4 Stainless Steel self-countersinking screw has a new underhead with saw-blade like cutting teeth and six self-contained cutting pockets. Together they act similar to a circular saw-blade, transporting the drill dust away from the edge of the screw hole while cutting a perfectly clean hole into even the most brittle materials without cracking any surface treatment. This design also further enhances the R4's versatility by allowing the fastener to be installed without countersinking into even the hardest woods. The screw head closes the hole off with precision, leaving no damaged fibers around the head.