Crew can quickly fasten these opening blocks wherever needed. ULC bearing technology ensures sheaves turn smoothly and maintain efficiency at high loads. The articulating Loop carries the block¶???s primary load.
| Sheave ∅ (mm) | 100mm |
| Weight (g) | 1350g |
| Weight (kg) | 1.28kg |
| Maximum line ∅ (mm) | 30mm |
| Maximum working load (kg) | 12000kg |
| Breaking load (kg) | 24000kg |
| Loop ∅ (mm) | 17mm |
| Use loop | HCP1852 |
| Footnote | Weight includes loop and strap. |
DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.
![Whitecap Door Hinge – 316 Stainless Steel – 1-1/2″ x 3″ [6028]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/whitecap-door-hinge-316-stainless-steel-1-1-2-x-3-6028.webp)
![Schmitt Marine Heavy Duty Waterproof 2-Speed Wiper Motor – 3.5″ Shaft – 12V [33631]](https://www.sailorgearcorner.com/wp-content/uploads/2026/10/schmitt-marine-heavy-duty-waterproof-2-speed-wiper-motor-3-5-shaft-12v-33631.webp)