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

TEKTON 3/8 Inch Drive x 21 mm 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
• Deep 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