10-45mm HSS Spiral Grooved Step Drill Bit Nitriding Black Groove Core Hole Cutter Bit

Features Scop: thin iron plate, aluminum, insulation panels, PVC panels 4mm thickness within the timber Titanium coated to reduce friction and run cooler Automatically deburr holes as you drill High speed steel,durable Widely used to cut holes in a variety of material like steel, wood, thin iron, aluminum alloy, insulation boards, PVC sheet,ect Specifications Color Black Material High Speed Steel Surface Nitrogen Treatment Shank Triangle Round Handle Type 10-45mm Shank 25 x 12mm Total Size 45 x 100mm Package Includes1 x 10-45mm Spiral Grooved Drill