These strong steel cables prevent hose whip in case of accidental separation of coupling or clamp device, preventing accidents and injury. Whip-Check reaches across the hose fittings to provide stand-by safety for hose. Spring loaded loops in the cable ends open easily to pass over the couplings for a firm grip on the hose. Highly resistant to rust and corrosion. Whip-Check cables should be installed in the extended position with no slack. Working pressure: 200 PSI. Two styles available.