【Bi-metal Hole Saw】 10mm Shank, 120mm Diameter 100% High Carbide Tipped with Center Shank. 【Carbide Steel】 Made of case-hardened steel, cuts four to seven times faster than high-speed steel. 【Sharp and Durable】 It has stable mechanical properties, high wear resistance and high impact resistance, ensuring a long service life. 【Design for】 The bi-metal hole saw is designed for drilling holes in sheet metal, drywall, plastic pipes, wood, PVC and fiberboard. 【Buy with Confidence】 We will reply you within 24 hours on weekdays (please clamp the shank in the right place and take necessary protective measures when processing wood). Bi-metal Hole Saw Perfect for installing locks, knobs in doors and cabinets, or drilling larger diameter holes in desks, etc. Designed for drilling holes in sheet metal, drywall, plastic pipes, wood, PVC and fiberboard. Durable Double metal hole with M42 carbon steel and bi-metal, sharp and