Gibraltar SC-4420S Super Hi Hat Clutch SC-4420S Hi-Hat Cymbal Clutch The advanced-design Gibraltar Hi-Hat Clutch provides better access to the cymbal bell and easy butterfly nut adjustment High-grade steel and super-dense felt provide years of hard use The advanced-design Gibraltar Hi-Hat Clutch provides better access to the cymbal bell and easy butterfly nut adjustment High-grade steel and super-dense felt provide years of hard use