1/2" DR. 21MM MAGNETIC SPARK PLUG SOCKET (S17M4121, JONNESWAY)
1/2" magnetic spark plug socket, 21 mm, 12-point, short. A magnet holds the spark plug securely. Made of CR-V steel; the Flank drive design transmits force through the sides, working even with slightly worn fasteners. Thorvik/PRIDE S17M4121.