Steve Goodson's key clamps are well designed and are the most saxophone friendly clamps on the market. The clamps are extra long so that even pressure is applied to every key on the upper and lower stack. The lower stack clamp extends above the F key to clamp all the keys in the lower stack. The bell keys are held firm with a clamp instead of plugs. The clamps are fully adjustable and can be bent so that they will work on all brands of saxophones. The alto and tenor clamps are different sizes so if you have two instruments it is best to get both.