Upper arm restraint for modular system HEAVY 60x60mmThese premium upper arm restraints are designed to mount onto 15 cm stainless steel slide in rails, allowing secure and comfortable fixation of the upper arms during bondage scenes. Compared to the ball joint version, these cuffs sit closer to the rails, making them especially suitable for use with stocks, pillories, and tight restraint systems. Features & Benefits Secure upper arm fixation: Holds the arms firmly in place, ideal for strict bondage,