Smooth cutting the bi metal hole saw offers smooth cutting through various materials. The tooth configuration vario tooth strip is ideal for gliding through material to provide smooth cuts. Made of bi metal hss high speed steel containing 8% cobalt alloy, this hole saw has less risk of tooth breakage and higher heat resistance for long lasting cutting. Use this hole saw when cutting through wood, metal and plastics the bi metal hole saw fits all standard adapters on the market. Fits threaded standard adapter. Features and benefits bull smooth cutting bull bi metal hole saw offers smooth cutting through various materials bull tooth configuration vario tooth strip is ideal for gliding through material to provide smooth cuts specifications diameter 52mm diameter 2 2 1 16 working length 44mm working length 44mm