【Bearing design and double-groove design 】 Each pulley has two bearings made of bearing steel, and the two grooves are processed from separate stainless steel parts. This design significantly reduces friction, making the pulley rotate more easily, quietly and smoothly. Meanwhile, it can also effectively reduce the heating of the rope. 【 Polishing 】 We polish every corner of the pulley, remove burrs, and make the appearance smooth and shiny. The silver pulley is not only