Our 100lb roller has zinc plated roller sections to help prevent rust, and come with a protective wheelie case. Constructed of solid steel to provide a lifetime of trouble-free service. All models have rollers with smooth surfaces and rounded corners to protect flooring materials from indentations. Each roller section "floats" independently on the axle to compensate for subfloor irregularities. The end roller sections are recessed to inset the axle to prevent wall scuffing. The yoke has a detachable handle so both parts may be carried separately.