
Silent double bearings are suitable for floor, wall, beam, and should be installed on solid concrete or solid metal. (Aluminum alloy, wooden surface cannot be installed. Vertical force is not recommended). Multi-purpose, DIY fitness equipment, simple and saves space. Simple and practical 136-272 kg rollers, using gravity and skating for lifting work, designed for use with rope or cord indoors and outdoors to hang heavy objects or lighten the load. Hole diameter (approx.): 10 mm. Suitable for: 0-10 mm wire rope. Package: 2 pulleys, 4 bolts.