The KLEDGE-LOK tool and KLEDGE-LOK system is the key to permanent, fast and economical A/C repairs, according to the company. The KLEDGE-LOK tool is designed to fit into the compact spaces where A/C lines are found, allowing most repairs to be completed right on the vehicle. The KLEDGE-LOK repair fittings consist of tube-to-tube unions, tube-to-hose unions, and block-offs. The specialized alloy and design of these fittings makes for corrosion-proof and leak-proof repairs that are pressure-rated and tested up to 2000 PSI.