DuraTread never flat wheels allow you to move loads easier even over rough terrainsErgonomic handle is designed to require less force when moving heavy loads up to 175 lbs.Handle design enables users to maintain proper back posture by leveraging shoulder and torso muscles rather than relying on arm muscles aloneIntegrated tilt and kickplate provides maximum tilting when transporting materialsInnovative venting channels make lifting out liners easier, improving productivity and reducing the risk of injury