High-quality fittings, long casters life, wear-resistant bearing capacity, durable and strong. Ideal for everything from DIY to industrial applications, homes, schools, shops and hospitals. Solid cast iron pulley, wear-resistant, not easy to fade, compact design, can be pushed smoothly. Solid brass material, carefully polished and polished, strong and durable, three-hole screw installation, good driving performance. High-quality solid copper wheels, flexible steering, quiet, durable, can carry overweight objects, save energy and absorb vibration on uneven ground.