Tools & Gear Driver Bits Insert Bits

5300-PH4X30 #4 Phillips® 5/16" Hex 30mm Insert Bit 30mm Insert Bit Phillips® Head (PH) is the most common screw drive system. PH insert bits absorb torque peaks and reduce slip between insert bit and screw head. 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.