Overview:BGS Plasterboard Bit Set with Depth Stop - 6 pcs - 50406, these bits prevent overdriving into plasterboard and plywood. It should be used with a bit holder (available separately) or directly in a battery operated drill or screwdriver in soft materials.Advantages:Prevents overdriving in gypsum board and plywoodFor flush screwing in soft materialsFeatures:3 bits, 25 mm, Phillips PH23 bits, 50 mm, Phillips PH2Drive profile : Hexagonal maleDrive profile size: 1/4" (6.3 mm)Material: chrome vanadium steel (S2)Weight: 320 gPackaging:One set of bits with depth stop for plasterboard BGS - 6 pcs - 50406Delivered in original packaging