3/8 Inch Drive x 18 mm Shallow 12-Point Impact Socket BoltsandNuts.com Flute Length 2-7/16"

Flute Length 2-7/16"

which together make up the 4-point mechanical structure of the clamp

Flute Length 1-1/8"

The included 18 gauge stands are designed to guide each key into its slot

Overall Length: 4-3/4"

3/8 Inch Drive x 18 mm Shallow 12-Point Impact Socket BoltsandNuts.com Flute Length 2-7/16"Size is marked both with a high visibility laser marking and a permanent stamped marking that won't wear off Shallow 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 Meets a minimum of 1. 3 times the ANSI ASME standard for proof torque Detent pin hole on one side allows works with both friction ring and detent pin