3-piece Set of High-speed Steel Nitrided Black Spiral Fluted Triangular Shank Titanium-plated Step Drills Metric Pagoda Drills

Product material: high speed steel 4241 Handle: triangular handle Surface treatment: nitriding (black) Style:Triangle handle Dimensions: 4-12 handle diameter 6mm, 4-20 handle diameter 8mm, 4-32 handle diameter 10mm Blade length per step: 4-12：8mm 4-20:5.5mm 4-32:5mm

Suitable for workpieces with a hardness of 25 or less, such as a thin iron plate, insulation boards, wood

Packing included:1*Step Drill Bit or 3pcs Step Drill Bit