The endpin is the component of a cello or double bass that makes contact with the floor. It is made of metal and is extensible from the bottom of the instrument, and secured with a thumbscrew.

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 shape of the instrument, but some bassists retool their instruments so that their endpins angle back, improving support. 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.

Endpin Stoppers

To prevent slippage of cellos (the endpin is the main source of support for the cello), objects known as "endpin stoppers," "endpin anchors," or "rockstops" are sometimes placed between the endpin and the floor. This consists of some kind of rubber or polymer topped with a circular cup to hold the endpin's tip. By increasing the instrument's surface area of contact with the ground, these stoppers make friction stronger and ease playing. Endpin stoppers may be independent or have a strap to anchor itself to the musician's chair. Basses do not require stoppers, as the large mass of the instrument presses down harder on the floor, making them unnecessary.

Endpins and Flooring

Pointed endpins can cause extensive damage, especially to tile and wooden flooring. Many music rooms bear evidence of this in a myriad of small holes. Here, rubber tips and/or stoppers are beneficial. On carpet, the damage is less extensive. The bare tip is thus most effective in outdoor conditions, and old flooring where the damage will not be as serious.