GRK Fasteners R4 121010 Screw, #9 Thread, 2-1/2 in L, Bugle Head, Star Drive, Self-Drilling, Self-Tapping Point, Steel Tool Storage & Organization Grooved hex shank prevents slipping

Grooved hex shank prevents slipping in drill chuck or bit extension

Its cleanable

these products are designed to be easy to use while still giving you the power you need to finish the job the fast and right the first time

1/8 in maximum depth of cut 1/8 in

GRK Fasteners R4 121010 Screw, #9 Thread, 2-1/2 in L, Bugle Head, Star Drive, Self-Drilling, Self-Tapping Point, Steel Tool Storage & Organization Grooved hex shank prevents slippingGRK's R4 self countersinking screw has a patented under head with saw blade like cutting teeth and six self contained cutting pockets. Together they act similar to a circular saw blade, transporting the drill dust away from the edge of the screw hole while cutting an ideally clean hole into even the most brittle materials without cracking any surface treatment. This design enhances the R4's versatility by allowing the fastener to countersink into even