The Pearl OPT1516 Steel OptiMount for Drums 15”-16” deep attaches to the tom’s tension rods and float on rubber cushions, which provide the ultimate stability while allowing the drum to resonate fully. With OptiMount, the mounting hardware is completely removed from the drum shell, providing a drastic improvement in resonance and sustain. The Steel OptiMounts are for drums 8”-16” in diameter and have an UltraGrip Wingnut.