LITTLE GIANT 3600-LB. CAPACITY MOBILE WORKBENCH - 72X36"" TOP ENGAGE THE FLOOR LOCK MOUNTED BETWEEN THE SWIVEL CASTERS TO STOP UNWANTED MOVEMENT.BR /BR / FULL-WIDTH LOWER SHELF HOLDS UP TO 500 LBS. 2X2"" FRAME IS -1/4"" THICK EASILY ROLLS ON (4) 6"" PHENOLIC CASTERS—2 SWIVEL 2 RIGID ALL-WELDED 7–12-GAUGE STEEL CONSTRUCTION