This is an axle nut socket. It is 1/2 in. It is 36 mm. Black oxide finish. Size etched on socket. Constructed of steel. Socket is 12 point, deep design.
TITAN 3/8" DR X 12" SEALED HEAD RATC
TITAN 1/4'' Dr Mini Ratchet TITAN 12101
TITAN 1/2" DR RATCHET REBUILD KIT
TITAN 3/4" DR X 6" IMPACT EXTENSION
TITAN 3/4" DR UNIVERSAL JOINT
TITAN 1/2" DR EXTENDABLE RATCHET