Endpins are small devices used in various musical instruments, particularly in string instruments like the cello and double bass. They are located at the bottom of the instrument and help support it while allowing for adjustments in height and angle. This ensures that the musician can play comfortably and maintain proper posture. Typically made of metal or wood, endpins can be fixed or adjustable. The adjustable ones allow players to customize the instrument's position to suit their playing style. Proper use of an endpin can enhance sound quality and improve the overall playing experience.