Neilsen 6pc Titanium Coated HSS Countersink Drill Bit Set For Steel Wood Bits Size: 6.3,8.3,10.4,12.4,16.5,20.5mm Suitable for carbon steel, sheet steel fibre board, PVC and Wood Size: Diameter x Shank x Length 6.3 x 5.0 x 37mm 8.3 x 6.0 x 40mm 10.4 x 6.0 x39mm 12.4 x 10 x 46mm 16.5 x 10 x 47mm 20.5 x 10 x 47mm.
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