A ball bearing mainsheet system with integral sheaves (2:1 3:1 or 4:1).
Specifications:
| Size 1 | Size 2 | Size 3 | |
| Length | 118mm | 145mm | 170mm |
| Width | 57mm | 70mm | 87mm |
| Height | 97mm | 116mm | 133mm |
| Weight | 400g | 775g | 1181g |
| Safe Working Load | 500kg | 700kg | 1000kg |
| Sheave Diameter | 50mm | 60mm | 70mm |
| Sheave Width | 36mm | 36mm | 45mm |


