The Blue-Point TPMS Valve Stem Cap Set, No. VSC4KT, allows the user to dimply replace a standard sized valve cap with the tool which will depress the valve stem for rapid deflation. This helps avoid breaking the TPMS sensor when removing a valve core. The caps come clearly marked for easy identification for the reinstallion of the tires. Their blue anodizing makes the sockets easily visible on most rims or tires and their knurling provides sure grip even in greasy situations. The back side of the tool allows for valve cap storage while the tools are in use.