Double-flute step drill bit is made of premium high speed steel, with Coblat coated. This unibit is compatible with electric hand drill or drill press. Technical information Hole Sizes(in) 3/16 1/4 5/16 3/8 7/16 1/2 Flutes 2 Shank Type Hex Head Material Cobalt Coated HSS Applications Sheet MetalWoodPlastic Machine Electric Hand DrillDrill Press SHIPPING DIAMETER UNIT Pcs Net Weight 200Package in Plastic BoxPackage Size 130 x 40 x 40mm

step drill