T-Handle 5/16-18 Serrated

This 5/16-18 serrated T-Handle bites down where a smooth tip would slip, which is exactly what you want on hardware that gets cranked tight all day. The 5/16-18 thread is a straight swap onto a pile of common grip gear, so keeping a spare around saves a trip to the rental house. Once you lean on it, the serrated end holds.