General description Trend QR/DBG/SET Quick Release 3 Piece Hinge Lock Centred Pilot Hole Drill Bits are designed for accurate self-centred pilot hole drilling for hinges and lock face plates. This set features a quick release 1/4 inch hex shank, making it compatible with quick tool change drills and impact drivers. The drill bits are suitable for use on timbers and boards. Technical specifications Drill bit guide sizes: 3/32" (2.4 mm), 7/64" (2.8 mm), 9/64" (3.6 mm) Screw sizes: No.6 (3.5 mm), No.8 (4.0 mm), No.10 (5.0 mm) Material: High Speed Steel (HSS) Usage Ideal for drilling pilot holes for hinges and lock face plates Compatible with quick chucks and impact drivers Other information Sprung loaded mechanism ensures drill bit retracts safely Easily dismantled for cleaning and drill bit replacement Standard equipment includes 1x TREND QR/DBG/SET Quick Release 3 Piece Drill Bit Guide Set