This bit is designed for use with a traditional hand brace. In use, the tapered square shank slides into the square hole at the bottom of the brace chuck thereby preventing the bit from slipping. The bit comes with one large and one small cutter. You may adjust the bit to cut any hole size between 7/8" and 3". Overall length about 9". If you just need to drill the occasional hole or wish to drill larger holes, this is a great bit to have. Made by Irwin in China.
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