Imperial blades-iboa391-1-made in the U.S.A. Universal fit 2 in. 90 degree plunge cut blade 1-pk. Features our one fit system allowing our blades to fit 98% of multi-tools/oscillating tools on the market. This blade is good for getting into hard to reach areas. This blade has 18 teeth per inch. The bi-metal blade will cut wood, metal and plc..