MBCB-52 Series Mobile Benches - All-welded steel rolling bench has a heavy duty 14 gauge work surface. Locking tool box TB-9 has 9 drawers: two 21 " W x 3 " H, two 21 " W x 1 " H, and four 6 " W x 1 " H, and one central locking 6 " W x 3 " H drawer. Three rear 52" W x 8" D utility shelves add to storage space. Two swivel and two rigid 5" x 2" polyurethane casters for easy maneuverability on all floor surfaces. Capacity: 4,000 lbs. Casters: 2 swivel, 2 rigid 5" x 2" polyurethane casters. Options: Vise, floor lock.