Oscillating 45 mm. 1-3/4” bi-metal blade standard flush cut universal saw blade. Used for cutting wood, chipboard, plastic, aluminum, sheet metal & soft metal. Bi-Metal steel construction allows for long life and superior cutting performance. Unique shape allows for flush cuts in hard to reach places. Universal arbor allows for use in most major power tool manufacturers tools. Adaptor required for Rockwell brand Sonic rafter tool. Pack of 1.