Lang Tools 401 Rapid Deflator with TPMS Location Marks Sockets are clearly marked with LF (left front) and RF (right front) LR (left rear) and RR (right rear) for easy identification so tires can be returned to original position without TPMS needing to be reset Orange anodized aluminum with permanent markings for easy identification Cutout allows for quick evacuation of air without removing valve core Socket also hold valve caps for easy storage Knurling creates sure grip even in greasy situations