TEKTON 3/8 Inch Drive x 21 mm Deep 12-Point Impact Socket | SID13321

Size is marked both with a high-visibility laser marking and a permanent stamped marking that won't wear off 12-point socket opening provides an exact fit for 12-point fasteners Radiused corners prevent fastener round-off by applying force to a fastener's flat sides, rather than its corners Interior socket well extends far into the socket, which allows for better fastener engagement in more situations Meets a minimum of 1.3 times the ANSI/ASME standard for proof torque