The C7BMR 7¼-inch pro-grade circular saw from Hitachi Power Tools features patented Internal Double Insulation technology, which reduces vibration and wear, extending tool life more than 200 percent. Designed with a 15-amp motor and electric brake for safety, it cuts quickly and smoothly through framing materials. The IDI technology enables the aluminum housing to be intertwined with an injection molded inner nylon core for improved reliability.