Heavy service (HS Series) (Fully closing)
| Order number | Clamping capacity | Throat depth | Clamping force | Approx. weight |
| inches | inches | lbs | lbs | |
|---|---|---|---|---|
| B-HS 1 | 0 - 1 3/8 | 1 3/32 | 5600 | 0.9 |
| B-HS 1.5 | 0 - 1 3/4 | 1 7/16 | 8750 | 1.8 |
| B-HS 2 | 0 - 2 3/8 | 1 7/8 | 12500 | 4.05 |
| B-HS 3 | 0 - 3 5/16 | 2 5/16 | 16250 | 6.85 |
| B-HS 4 | 0 - 4 1/2 | 2 3/4 | 20000 | 10.5 |
| B-HS 6 | 0 - 6 3/8 | 3 3/8 | 27500 | 18.65 |
| B-HS 8 | 0 - 8 1/4 | 3 5/8 | 31250 | 26.2 |
| B-HS 10 | 0 - 10 1/4 | 3 15/16 | 35000 | 37.65 |
| B-HS 12 | 0 - 12 3/8 | 4 1/4 | 40000 | 45.8 |
