GRK’s R4™ self-countersinking screw has an under head with saw-blade like patented cutting teeth and six self-contained cutting pockets. Together these features act like 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 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.
- Pheinox R4 #8 Screws require a T-15 bit
- Pheinox R4 #9 & #10 Screws require a T-25 bit
|Package Quantity||GRK Pheinox R4 Stainless Steel Screw quantities vary by selection|
More About our Products
More reasons to buy this product, and the tools to help you do more
Deck Perks Loyalty Program earn points for tagging this item, Writing a review, sharing the link and of coarse making a purchase.
Get Something Free Many products offer free or discounted items with purchase of a related item
Calculators Use the tools below to calculate the number of balusters need to fill your rail, cut your stairs, and more