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

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Measurement Standard
Socket Size
- 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
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