PHEinox™ R4SS Multi-Purpose Screws
Limited Quantities Available
GRK's R4™ multi-purpose self-countersinking screw has six self-contained cutting pockets which act like a router and transport the "drill dust" away from the edge of the screw hole.
Made from PHEinox ™ hardened stainless steel with a Star Drive
Widens the countersink hole only around the head. The top of the screw closes the hole exactly, leaving no damaged fibers around the wider area of the head.
Pre-countersinking is no longer required, its done by the screw itself