[Application]:This Fish Bit works great for running wire in finished ceilings and walls with minimal damage | [Flexibility]:our bits are made from high quality material and the max flex is 90 | [Anti-slip end]:the fish bit was designed with a three flat tip shank to prevent slipping in chuck | [Pulling Cable]: Fish eye hole provided near tip of flutes to aid in pulling wire inside wall cavity from either direction after drilling, without damage to the wall | [Dimension]:9/16-inch head diameter, 3/16 inch shank diameter, and overall length is 54-inch