MDBTTOOLS 2" Deep Cut Hole Saw – M42 Bi-Metal with 8% Cobalt, High Concentricity 0.3mm+/-0.1mm , 3X Life – Hole Saw Only (Arbor & Pilot Bit Sold Separately) 【Precision Drilling Starts Here – High Concentricity0.3mm+/-0.1mm 】 This hole saw is engineered to a tight concentricity tolerance of 0.3mm+/-0.1mm . That means perfectly round, wobble-free holes for door hardware, pipe penetrations, and any precision installation. No filing, no rework – just clean, accurate results. 【M42 with 8% Cobalt – 30% Faster, 3X Longer Life】 Manufactured from premium M42 high-speed steel and 8% cobalt alloy. Compared to standard HSS hole saws, it cuts 30% faster and lasts three times as long (3X). Excellent heat resistance for drilling stainless steel, alloy, brass, and copper. 【2" Deep Cup – 45% Deeper than Ordinary 1-3/8" Models】 Full 2-inch (50.8mm) cutting depth lets you drill through thick wood beams, multi-layer drywall, pipe walls, and heavy metal plates in one pass – something standard shallow hole saws cannot do. 【Oval Eject Slots + Progressor 4/6 TPI Teeth】 Oval-shaped eject slots rapidly clear chips to reduce heat and prevent clogging. The variable 4/6 TPI progressor tooth design cuts smoothly across wood, metal, and plastic, while making plug removal fast and hassle-free. 【Reinforced Shoulders for Heavy Duty】 Reinforced shoulder construction adds extra strength, preventing cracking or warping under high torque. Built to last on professional job sites. 【Compatible with Standard Arbors】 This hole saw features a standard 7/16" (or 3/8" – please confirm) drive flat. It works with most quick-change or standard arbors. For best performance and perfect centering, we recommend using a pilot drill bit. 【Need an Arbor & Pilot Bit?】 This listing is for the hole saw only. If you need a complete ready-to-use set, please check our MDBTTOOLS Arbor & Pilot Bit Set (sold separately) – designed to pair perfectly with this hole saw for a wobble-free, precision fit. 【Materials You Can Drill】 - Thick stainless steel (up to 2" depth) - Alloy steel, aluminum, brass, copper - Wood, plywood, MDF - Plastic, PVC, acrylic - Drywall, gypsum board Upgrade to MDBTTOOLS – deep cutting, pinpoint accuracy, and 3X the life. Get the hole saw today and pair it with our arbor set for a complete drilling solution.