Grizzly T10021 Premium Mortising Chisel, 3/4-Inch Main motor: 6-1/2 hip 220v 3-phase; scoring blade motor We tested just about every name brand mortising chisel on the market including some from Europe and tested them side by side against these Japanese on It is our opinion that there isn't a mortising chisel on the market today that is better in quality and performance than these