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 rust and corrosion

rust and corrosion

1/4 in turn operation

Two-panel 1/4 in

Made in US

We cover each blade with two coats of PVC protected by double shield

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 rust and corrosionGRK'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