Tungsten Carbide Tipped (TCT) Multi Purpose hole saws feature a unique tooth set for an ultra-aggressive, high performance cutting of non-metallics. Rapid, heat-free stock removal of wood, MDF, plastics, and ceramic tiles, with a 54mm (2.1/8") cutting depth. Power through wood, MDF, plastics, plasterboard and ceramic wall tiles up to five times faster than a bi-metal hole saw. Carbide Tipped teeth for outstanding cutting performance and product durability. Cutting depth of 54mm (2.1/8”). Smooth cut with minimal heat build up. Suitable for use in mains and battery powered tools. Special arbors featuring extended length pilot drills are availableTeeth per Inch (25mm): 1Teeth Type: Tungsten Carbide TippedCountry of Origin: CN Specifications Diameter metric: 57mm Diameter imperial: 2,1/4" Cutting Depth metric: 54mm Cutting Depth imperial: 2,1/8" Thread Size: 5/8 -18