Stepped drill bit for helical nitriding, multi-hole cutter 10mm-45mm total, 8 steps, hole sizes, cutting, enlargement, sheet metal, PVC, woodworking

HSS4241 High-Speed Steel Step Drill Bits: 10-45 Flute-Cutting Twist Drill Bits, Nitro-Coated. Automatic hole deburring during drilling. Application: Suitable for workpiece hardness less than 25, such as carbon steel, sheet metal, insulation boards, PVC panels, floorboards, wood, and thicknesses less than 5 mm. 8 increments: 10 mm, 15 mm, 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm. Specifications: Color: Black (as shown) Material: 4241 High-Speed Steel Surface: Nitro-treated (increases hardness and abrasion resistance) Shank: Triangular round shank Type: 10-45 mm (10, 15, 20, 25, 30, 35, 40, 45 mm) Overall Size: 45 x 100 mm Weight: 350 g Package includes: 1 step drill bit 10-45