3pc/set(3 12mm/4 12mm/4 20mm) Step Core Cone Hole Cutter - Hss Steel Titanium. Specifications: Material: HSS Steel. Net Weight:835g Set of 3 for Jobs of All Sizes. 2 Fluted Edges for Faster, Smoother more→Cutting. Hex Shank Prevents Slippage when in Chuck. Surface Treatment: Titanium Plating. Ideal for Using to Cut Holes in a Variety of Materials Including Steel, Brass, Wood, Plastic, Etc. The Lengths Are Separeately 73.5 ( 20 Step ), 80mm ( 10 Step ), 68mm ( 5 Step ). The 3 Cutters Come in the Following Sizes: 4 - 12mm: 4, 6, 8, 10, 12mm. 4 - 20mm: 4, 6, 8, 10, 12, 14, 16, 18, 20mm. 3 - 12mm: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12mm. Package Included: 1* Set HSS Power Drill (3pcs) . We are an international …