Chain Pulley BlockHas been tested as per ISI procedures for 50% over load, delivering assured Safety levels Equipped with a Grade 80 Load Chain for Long chain life Assuring you reliability with its Rugged German design and Customer Satisfaction spanning more than 30 years Double Ball Bearing Supported Load Wheel for Smooth Operation Precision Machined Case hardened alloy Steel Gears benefiting longer life span & noiseless operation Fully Pocketed Malleable / S. G. Iron Cast Load Chain Wheel for safe and smooth running Anti Rust and Better Aesthetics With Anti - Corrosive Powder coated Zinc Plated parts