OCGIG 6-65mm Large HSS Spiral Groove Step Drill Cone Drill Bit Titanium Coated Hole Cutter

Features: 1/4" Hex shaft drives are suitable for all kinds of power drills. 3 cutting blade design makes for cutting faster,automatic deburring from hole when drilling. Spiral step drill bits, 6-65mm ,main material high speed steel, titanium coated high quality step drill bits. Special Features: Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life. The tapered design is suitable for drilling larger and deeper holes, or enlarging the aperture in areas where it has been drilled. The three flute design(Based on two flute design improved,more effect)tips made the penetration faster without chipping. This step drill includes 13 steps, which meet your different hole drilling needs perfectly. Usage: Cutting holes in materials(hardness:<25 degrees) like iron plate, aluminum plate, insulation boards, PVC sheet, ect. Sizes: 6-65mm: 13 Steps (6mm, 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm) Package includes: 1 x 6-65mm HSS Groove Step Drill