E
ndpin is the component of a cello or double bass that makes contact with the floor. It is made of metal, or in some cases wood or carbon fiber, and is extensible from the bottom of the instrument, and secured with a thumbscrew. Most bass clarinets and contrabassoons also have a similar fixture. Endpins are usually tipped with a point to stick into the floor, which is sometimes capped with black rubber to preserve the floor's surface and provide friction. 
