The Gibraltar R-Class universal hoop clamp can fit on any die cast, triple flange, single flange, or other metal snare or tom hoop. It can accept any L-rod arm, floor tom legs, and bass spurs to add any type of accessory arm, cymbal arm, mic mount, or to convert a floor tom into a bass drum. Fits 9.5mm, 10.5mm and 12.7mm arms and legs.