This 12″ hook‑type sheave assembly fits pullers like the UT8, UT5, 6001, UT4 and UT2. It features a welded steel frame and forged steel closure hooks with a 1″ (25.4 mm) opening. The aluminium‑alloy sheave (11.75″ OD) rides on self‑lubricating bearings and has a groove radius of R 2.25″. Rated to 8,000 lb (≈ 35.8 kN) maximum capacity.