Features: Multiple Size: HSS Hole Saw Kit with 5 size:16mm/0.62in(5/8-Inch), 18.5mm/0.73in(3/4-Inch), 20mm/0.78in(4/5-Inch), 25mm/0.98in(1 Inch), 30mm/1.18in(1-3/16 Inch),for cutting most material. High Quality HSS: 16-30mm Hole Cutters are made from strong 4241 HSS high speed steel for durability, high hardness, quick cutting,Impact resistant, high temperature resistant. Exquisite Production: Shank of drill bit is irregular hexagonal design, tooth edge is intelligent indexing by CNC machine to grind tooth, formed at once, sharpen edge with high precision. Wide Applicable:Suitable for hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine. Provide quick and precise cuts into stainless steel, sheet metal, cast iron, mild steel, aluminum, plastics,copper and brass. Specifications: Color: Titanium Material: HSS Size: 16mm/0.62in(5/8-Inch), 18.5mm/0.73in(3/4-Inch), 20mm/0.78in(4/5-Inch), 25mm/0.98in(1 Inch), 30mm/1.18in(1-3/16 Inch) Item Size: 67.5*8*30mm/2.65*0.31/1.18in Item Weight: 200g/7.05oz Package Size: 160*110*40mm/6.29*4.33*1.57in Package Weight: 340g/11.99oz Note:Recommended Opening material thickness is less than 2mm. Packing List: 5 * Hole saw 5 * Wrench