When you’re reputation is built on “tough”, you’d better build one heck of mechanical! It wasn't good enough for us to just have a mechanical head in our line, so we reinvented the mechanical head. The EXP brings a new level of computer-controlled machine capability to broadhead building. Starting with a tiny, spring tension clip that holds the blade in place when open and closed, and ending with a new idea in stop collars that lets YOU choose from two cutting diameters just by flipping the collar. The EXP is a masterful blend of engineering and technology. Innerloc EXP features the Cliploc blade retention and control system. Blade changes have never been easier with no need for rubber bands or o-rings to keep the blades in the in-flight position. The 100 grain 3 blade broadhead has a 1 1/8" or 1-7/16" cutting diameter.