6PCS Annular Cutter Kit 1 cutting depth, includes 6 pcs high speed steel annular cutters, Cutting Diameter(1-1/16”, 15/16”, 13/16”, 11/16”, 5/8”, 9/16”), 2 pilot pins(6.354/5.377mm) and plastic storage case. HSS annular cutter, with unique cutting edge geometry provide efficient cutting, fast feed rate, less vibration, smooth hole surface and long tool life, the effective of drilling is much better and quicker than the common drill. 3/4 Weldon shank with 2 flats fits most major brands of magnetic drills, can also be used with machine tools such as mills and large drill presses with tool holders. Annular Cutter Set are made of tough M2 High Speed Steel for longer tool life, superior heat treated for maximum durability, has the advantage of being durable, super tough and longer life tool. HSS annular cutter can be widely used in drilling steel, copper, aluminum, stainless steel and plastic, in either plate or pipe form. Processing field such as oil rig, factory, bridge engineering, machinery manufacturing, shipbuilding industry, electricity, steel structure, railway construction industries. Features: Made of super tough high speed steel for durability, wear resistance, high efficiency. Large holes can be drilled up to 10 times faster than regular drills bits. Make overlapping holes, slotting holes and edge cuts. Premium Design: The annular cutter features enhanced cutting geometry, high quality steel and workmanship to ensure that this will outperform and last longer than standard cutters. Outstanding Performance: HSS annular slugger drill cutter bits has multiple cutting edges that create accurate, burr-free, high-quality holes that minimize the need for secondary operations such as pre-drilling and reaming to reach better performance of removing chips. Wide Usage: Applicable materials include various steel materials, steel plate, aluminum, stainless steel, brass, cast iron, tin, plastic, organic glass, laminated material, steel track etc. Caution: If you want to use this annular cutter on a drill press, you need an extra annular cutter arbor(not included).