- Ideal for multipurpose wood to wood framing
- For interior/exterior use
- Fast Bite Tip provides a fast start for one-step installation
- Zip-Tip eliminates pre-drilling
GRK R4 self countersinking screw has 6 self-contained cutting pockets which Act like a router and transport The drill dust away from the edge of the screw hole. They also widen the countersink hole only around the head Shape. The screw head top closes the hole exactly, leaving no damaged fibers around the wider area of the head.