39pcs Woodworking Drill Chamfer Tool Countersink Drill Bit Set with Automatic Center Punch

Features High quality material Made of high quality high speed steel with high hardness and wear resistance durable and practical High hardness and sharp perfect for drilling the extra thick wood Ideal for wooden planks fiberboard particle Unique Combination A variety of multi size woodworking drill bits are combined into a set for you to choose from Wide application Suitable for DIY household and general construction engineering use Very suitable for wood fiberboard particle board plywood plastic PVC and soft metals Suitable for hand drills bench drills and electric drills Specification 7pcs Core Drill Bits MaterialHigh carbon steelSize5 64inch 7 64inch 9 64inch 11 64inch 5mm 13 64inch 1 4inchGreat forTo open 2mm 2 8mm 3 5mm 4 5mm 5 5mm 5 2mm 6 35mm holes7pcs 3 Pointed Countersink Drill Bits MaterialHigh carbon steelSize3mm 4mm 5mm 6mm 7mm 8mm 10mmGreat forDrilling pilot holes the drill bit large chip flute and five edge chamfers allows faster and easier discharge of sawdust With the L shape hexagon key provided you could easily remove five bevel chamfer or adjust counter sleeve depth and drilling depth SizeDrill DiameterDrill Work LengthChamfering DiameterOverall Length3mm3mm38mm16mm52mm4mm4mm50mm16mm67mm5mm5mm62mm16mm84mm6mm6mm67mm16mm89mm7mm7mm85mm16mm103mm8mm8mm80mm16mm107mm10mm10mm87mm16mm120mm6pcs 5 Flute Countersink Drill Bits MaterialHigh speed steelSize6mm 1 4inch 8mm 5 16inch 9mm 3 8inch 12mm 1 2inch 16mm 5 8inch 19