Renfroe Model M is a multipurpose clamp used for positioning, sorting, erection and handling of prefabricated sections.
The split lower jaw enables the clamp to be particularly useful in handling structural shapes.
The Model M incorporates a “Lock Closed” feature which facilitates attaching the clamp to the member being lifted.
These clamps must be used in pairs, sets of pairs, or in a tripod arrangement for transporting plate horizontally. Handle is available on 8 ton clamp only.

| Rated Capacity ( Tons ) | Jaw Opening A ( in. ) | B ( in. ) | C ( in. ) | C h ( in. ) | D ( in. ) | MAX. E ( in. ) | F ( in. ) | G ( in. ) | H ( in. ) | J ( in. ) | Weight ( lbs. ) |
| 1/2 | 0-1 | 2 5⁄16 | 7 1⁄16 | – | 4 11⁄16 | 2 1⁄4 | 8 7⁄8 | 2 5⁄8 | – | 1 7⁄16 | 7 |
| 1/2 | 3⁄4-1 1⁄2 | 2 5⁄16 | 7 1⁄16 | – | 5 3⁄16 | 2 1⁄4 | 9 3⁄8 | 2 5⁄8 | – | 1 7⁄16 | 8 |
| 1/2 | 1 1⁄4-2 | 2 5⁄16 | 7 1⁄16 | – | 5 11⁄16 | 2 1⁄4 | 9 7⁄8 | 2 5⁄8 | – | 1 7⁄16 | 9 |
| 1 | 0-1 | 2 1⁄2 | 8 1⁄8 | – | 5 1⁄2 | 2 1⁄4 | 9 1⁄2 | 2 3⁄4 | – | 1 7⁄8 | 11 |
| 1 | 3⁄4-1 1⁄2 | 2 1⁄2 | 8 1⁄8 | – | 6 | 2 1⁄4 | 10 | 2 3⁄4 | – | 1 7⁄8 | 12 |
| 1 | 1 1⁄4-2 | 2 1⁄2 | 8 1⁄8 | – | 6 1⁄2 | 2 1⁄4 | 10 1⁄2 | 2 3⁄4 | – | 1 7⁄8 | 13 |
| 2 | 0-1 1⁄4 | 3 3⁄16 | 10 3⁄4 | – | 6 9⁄16 | 3 1⁄16 | 12 1⁄8 | 3 7⁄8 | – | 2 | 23 |
| 2 | 1-2 | 3 3⁄16 | 10 3⁄4 | – | 7 3⁄16 | 3 1⁄16 | 12 7⁄8 | 3 7⁄8 | – | 2 | 24 |
| 2 | 1 3⁄4-2 3⁄4 | 3 3⁄16 | 10 3⁄4 | – | 7 15⁄16 | 3 1⁄16 | 13 5⁄8 | 3 7⁄8 | – | 2 | 27 |
| 4 | 0-1 1⁄2 | 3 13⁄16 | 12 | – | 7 3⁄4 | 3 5⁄8 | 14 1⁄2 | 4 3⁄8 | – | 2 3⁄4 | 36 |
| 4 | 1 1⁄4-2 1⁄2 | 3 13⁄16 | 12 | – | 8 3⁄4 | 3 5⁄8 | 16 1⁄2 | 4 3⁄8 | – | 2 3⁄4 | 38 |
| 4 | 2 1⁄4-3 1⁄2 | 3 13⁄16 | 12 | – | 9 3⁄4 | 3 5⁄8 | 14 1⁄2 | 4 3⁄8 | – | 2 3⁄4 | 41 |
| 8 | 0-2 | 4 15⁄16 | – | 19 1⁄4 | 12 15⁄16 | 4 | 21 | 5 1⁄2 | 8 | 4 | 110 |
| 8 | 1 3⁄4-3 1⁄2 | 4 15⁄16 | – | 19 1⁄4 | 12 15⁄16 | 4 | 21 | 5 1⁄2 | 8 | 4 | 110 |
| 8 | 3 1⁄4-5 | 4 15⁄16 | – | 19 1⁄4 | 14 7⁄16 | 4 | 22 1⁄2 | 5 1⁄2 | 8 | 4 | 125 |