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GRKs 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.
- R4 Multi Purpose screw can be used for interior and exterior applications.
- For use in wood particle-board cement fiberboard plaFor use in wood particle-board cement fiberboard plastic sheet metalstic sheet metal.
- Enhanced design providing one-step installation.
- W-cut low installation torque allows for fast driving and ease of install.
- Optimized thread length improves clamping force for increased drawing power.
- Precision fit between R4 multi-purpose screws and GRK bits increases precision and improves productivity.
- Common project applications: remodeling fencing storage cabinets framing.