Clamp-aid Hose clamp end guards and T-Bolt covers are protective covers that slide over the exposed tails of worm gear hose clamps or T-Bolt studs helping to protect you from cuts and scratches while giving your work that "finishing touch" These are available in 6 different colors which can be used to match your color them or to color code hoses: BLUE cold/freshwater, RED hot or gas etc...