Adjustable hand strap shifts the weight of the instrument to the back of the left hand, away from the base of the thumb and the middle finger. Fully adjustable. Can be used on all models and makes of alto, tenor and bass trombone. This thing really works- it's not a gimmick.
• Length when laid flat: 11 inches (28 cm)
• Usable length (approximate): 7.75 to 9.5 inches (19.7 to 24.3 cm)