Spiral Grooved Step Drill Bit Set 4mm to 12mm/20mm/32mm Wood

This is set of step drills made of high speed steel 4241/6542 different specifications can meet different drilling requirements. Widely Used To Cut Holes In A Variety Of Material Like Steel Wood Thin Iron Aluminum Alloy Insulation Boards PVC Sheet etc.Features:Easy to install suitable for most of electric drill.Constructed of industrial high speed steel with titanium nitride coating for durability and strength to punch and drill clean holes in materials like plastic aluminum wood copper stainless steel and other types of sheet metal.Two-flute spiral grooved design deburrs chip dust and debris for clearance and smooth cutting.Quick change hex shank makes for easy convenient bit switches and is compatible with impact ready power tools.Assortment comes with 3 drill bits of a combined 33 sizes to add to your drilling arsenal: 4-32mm(4 6 8 10 12 14 16 18 20 22 24 26 28 30 32mm) 4-20mm(4 6 8 10 12 14 16 18 20mm) 4-12mm(4 5 6 7 8 9 10 11 12mm).Specifications:Material: High Speed SteelColor: GoldenHigh Speed Steel 4241: Suitable for use in hardness 25 degree below the workpieceHigh Speed Steel 6542: Suitable for use in hardness 28 degree below the workpieceSurface Treatment: Titanium CoatedStructure: Step Core Drill BitsSuitable for use: Thin iron plate aluminum insulation panels PVC panels 5mm thickness within the timberQuantity: 3pcs4-32mm (4 6 8 10 12 14 16 18 20 22 24 26 28 30 32mm)4-20mm (4 6 8 10 12 14 16 18 20mm)4-12mm (4 5 6 7 8 9 10 11 12mm)4-32mm drill size: 10.22*3.15*3.15cm4-20mm drill size:7.16*1.93*1.93cm4-12mm drill size: 7.35*1.16*1.16cmProduct weight: 215gPackage size: 11.3*4.8*2.8cm/4.44*1.88*1.10inPackage weight: 217gNote:Item color may show sight aberration due to different shooting light and monitor display.Packing list:1* 4-32mm drill1* 4-20mm drill1* 4-12mm drill