Description
GRK’s R4 self-countersinking screw has a new underhead with saw-blade like cutting teeth and six self contained cutting pockets. The screw head closes the hole off with precision, leaving no damaged fibers around the head. This multi-use screw can be used in wood, particle board, plastic, sheet metal, cement fiberboard, composite decking, wood decking and melamine.
- R4 Bit Table #4 uses T-10, #6 and #8 use T-15, #9, #10 and #12 all use T-25
- Self-Tapping, countersinking head, W-cut thread design and Climatek coated
- Wood, particle board, cement fiberboard, plastic and sheet metal
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