Like the 5 Series blocks, but with Schaefer's ball bearing sheave. Curved ball races allow Schaefer ball bearing blocks to take higher loads than other similarly sized blocks.
- Sheave: UV-protected white Delrin¨
- Ball Bearings: Delrin
- Sheave Size: 2" (51mm)
- Line Dia.: 7/16" max.
- Cheek Material/Finish: Black anodized aluminum or polished stainless cheeks, stainless straps
- Shackle/Strap Type: Swivel with three-way locking
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