1/2" DR. 21MM MAGNETIC SPARK PLUG SOCKET

1/2" DR 21mm Magnetic Spark Plug Socket Thorvik S17M4121, 12-point Flank drive, short. Made from chrome-vanadium (CR-V) steel, offering excellent resistance to deformation, corrosion, and wear. The Flank drive design transmits force through the sides of the socket, not the corners, allowing work with slightly worn fasteners without causing additional damage. Technical specifications: Size: 21mm Square: 1/2" (12.7mm) Profile: 12-point Flank drive Type: Short socket Material: CR-V steel Finish: Chrome polished