32mm and 25mm diameter steel tubing. Chain driven, 2pc footplate on a metal base with treated grip. Adjustable tension and side clamping mechanism. Retractable spikes. Double sided (felt/plastic) beater. These PP Drums stands have incredibly smooth action and rock solid clamping brackets so they won't let you down when you need it most! Large non-slip feet ensure your stands stay put under the heaviest use.