Screw clamp with a serrated, hardened tool steel swivel ball. Serrated grippers are designed to slightly penetrate the workpiece to significantly increase gripping force, rather than relying on static friction alone. A positive stop prevents the ball from swiveling too far. Made in USA.

| Item | Material | Heat Treat | Finish | DFARS | RoHS |
| Body | Steel | Carburized-Hardened | Black Oxide | Yes | Yes |
| Swivel Ball | High-speed tool steel | - | Black Oxide | Yes | Yes |

| A Thread (Inch) | B (Inch) | C Diameter (Inch) | D (Inch) | G (Inch) | Serrations | Serration Dimensions |
| 5/8-11" | 3" | 5/16" | 5/16" | 14ยฐ" | Extra Fine | 0.094x90ยฐ |