The TNA® bolt is a fixed spline fastener, meaning the tip will not be removed during installation. There are a few reasons for the design. Primarily the spline remains fixed to the bolt because we are performing a 2-step installation process with the TA Series Wrenches, snug tight and final installation using angle. Some other benefits to a fixed spline bolt are; No touch up of bare metal for mechanically galvanized bolts, no drop or slip hazard of loose tips in the shop or on the jobsite, and easy removal when required with a single tool from a single side.