Tissenbach Precision Tools 8mm shank hexagon rotary broaches are precision ground with a tolerance of +0/-.0005. Each nominal size conforms to the industry standard – ANSI B18.3 2003. All 8mm shank hex rotary broach tools include a pressure relief vent hole that allows air and fluid to freely escape during the rotary broaching process to reduce wear on your machine and extend rotary broach tool life. Click Buy Now button to choose broach steel, coatings and quantity.