Helps prevent valve core leaks causing low tire pressure and possible TPMS alerts. Slim design allows access in tight spots. Torque tool is set to 4 inch pounds to prevent under and over torquing the valve core. Lightweight, will fit in mechanic's pocket. Properly installs and removes valve cores, including late model vehicles with the Tire Presure Monitoring System (TPMS). Works great for A/C Mechanics as well, no more damaged cores or call backs due to leaks.