The HammerHeels are the easiest climber on the market to use. The climbing bail snaps up or down with a flick of your pole.These can also be used with Vices or other bindings. The plates are 3 cm tall with a 1 degree forward slope. If you are looking to mount these with a 22 Designs binding, buy the 1.5" size. If you're looking to replace another brand of climber or mount with ski inserts, buy the 27.5 mm size. A similar version comes with Axls and Outlaws. 1 pair.