Offered in 2 versions to suit preferences of those who want to be able to continue to use older style broaches, all-in-one kit includes holder, case, instructions, and multiple broaches to make most common sizes specified for Allen wrenches or hex keys. GT Series rotary broach holder features sealed bearings and uses .500 in. dia x 1.75 in. or 8 mm dia x 1.25 in. broaches. Pressure relief holes in each broach allow fluid or air trapped in blind holes to escape through center.