Tools & Gear Driver Bits Insert Bits

5300-PH2DWX25 #2 Phillips® Drywall Plasterboard 25mm Insert Bit 25mm Insert Bit Phillips® Head (PH) is the most common screw drive system. The drywall insert bit collar ensures the screw is set at the optimum depth in the drywall sheet. The finished depth of the screw head is set below the finished face of the drywall sheet without tearing the paper face.. All Bordo standard screwdriver bits are manufactured from premium heat treated alloy steel. Insert bits are not magnetic - they achieve magnetisation when used in conjunction with magnetic bit holders. Insert bits are a cost effective solution and inexpensive to replace in comparison to longer power bits.