This shear reduction block by Robertson Harness

main frame, backup shield, and axel are made of type 304 stainless. It features a 4” aluminum hard anodized sheave and a large “D” shaped rigging hole to accept 2 carabiners. The sheave locking bolt allows the sheave to be rotated 180 degrees, extending the use of life, but this product is also fully rebuild-able if you should ever need that.

Specifications:

• Mets and Exceeds ANSI/ACCT 03-2019 1.3.9 Standard

• Minimum 2 sigma breaking strength