GRK Fasteners R4 121050 Screw, #9 Thread, 3-1/8 in L, Bugle Head, Star Drive, Self-Drilling, Self-Tapping Point, Steel Audio & Video Supplies acrylics or artificial colors used

acrylics or artificial colors used to make traditional fiberglass insulation

removing more material with every pull for an easy

Includes: Hex Caps and Soft Tie

even sensitive electronics

The TURBINE blowers are lightweight

GRK Fasteners R4 121050 Screw, #9 Thread, 3-1/8 in L, Bugle Head, Star Drive, Self-Drilling, Self-Tapping Point, Steel Audio & Video Supplies acrylics or artificial colors usedGRK'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