Strong frames made of seam-welded high-tensile steel are mounted to hardwood bases. Extra-large work pockets on liner; all wear points are reinforced with vinyl. Trucks have 3" polyolefin casters. Available in 3 mounting patterns; specify: Corner mount with 4 swivel casters, corner mount with 2 rigid/2 swivel casters, or diamond mount with 2 rigid/2 swivel casters.