The stainless steel Tuggnutt chain tensioner offers a wide range of wheel positioning to tension the chain. The tensioner works only with rear facing horizontal dropouts! With two axle holes and an aluminium adaptor that reduces the axle hole from 10mm to 6mm, so you can use it with quick-release axles. It also features a thumbscrew, for tool-free adjustments. And last but not least it has an integrated bottle opener.