The Carlyle Tools Heavy Duty Tool Trolley, No. 815-1340, is designed for shops and service centers that require working at low heights in rugged environments. This tool trolley features four 3" diameter industrial pin casters with two locking casters; a plush 3.5" thick contoured vinyl seat and arching back support for improved comfort; and a removable deep steel storage tray for parts. This heavy duty trolley offers a 350-lb maximum load capacity.