Flat Mount Double Wire Rope Blocks feature single sheave, turned from cold-drawn zinc-electroplated bar-stock. Bushings are a combination of bronze and steel, designed for high load and medium speed applications. Bushings are oil impregnated for permanent self-lubrication. Sideplates are stamped from low carbon steel with a bright polished, galvanized finish. Rivets and clevises are zinc electroplated. Safe work load capacities are stamped into the sideplates in US and metric measurements. Block Division, flat mount double sheave wire rope blocks are high quality and USA manufactured.