Step Drill Bit Set, 3 Triangular Handle Spiral Groove Step Drill Bits, Step Pagoda Drill Bits, Tool Components For Opening And Expanding Drill Bits, Suitable For Plastic, Wood, Aluminum, Metal Plates, Metric 4-12/4-20/4-32mm

Description:Reliability - The drill bit is made of durable high-speed steel.Solve various tasks - this tool replaces a complete set of drill bits and can produce holes with diameters of 4-6-8-10-12-12-14-14-16-18-18-20-22-24-24-26-26-28-28-32 mm.Long service life - made of high-speed steel, titanium nitride coating can prevent premature wear and corrosion.Easy to operate - no need for surface pre-treatment (coring or drilling).Efficiency - Due to the use of spiral profiles and triangular handles, tools can easily drill into metal, with neat holes and smooth edges.Firmly fixed - the triangular handle will not rotate in the drill chuck.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: 1pcs4-32mm (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:7.35*1.93*1.93cm4-12mm drill size: 7.16*1.16*1.16cmPacking list:1x drill