Endpin

The endpin or spike is the component of a cello or double bass that makes contact with the floor to support the instrument's weight. It is made of metal, carbon fiber, or, occasionally, wood, and is extensible from the bottom of the instrument, and secured there with a thumbscrew. Most bass clarinets and contrabassoons also have a similar fixture.

Types of endpins

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. Generally, endpins are parallel to the long axis of the instrument, but some cellists and bassists fit their instruments with a Tortelier-style endpin, which angles more towards the floor, improving mobility at the expense of stability. Also, some endpins have a secondary extension for tall musicians. The endpin also may have notches cut in it, allowing it to have extra holding strength at these points. This design is particularly common on string basses and beginning-level cellos. The former often require these because of their greater weight.