The all new Bont Cycling Cleat T-Nuts now made of 316 marine grade stainless steel. Cleat T-Nuts are compatible with Vaypor S, Vaypor T, Vaypor , Zero , Zero T and Crono MK2. Bont Cycling t-nuts can be replaced by simply pushing against or punching out the existing t-nuts from the outside of the shoe. The new t-nuts drop into place from the inside of the shoe and the pressure of the cleat bolt installation will allow it to 'bite' into the sole. If your new t-nuts seem to spin too easy, use Loctite 401 or similar to hold them in place for initial tightening.