THESE WORK BENCHES FEATURE 12 GAUGE STEEL TOPS REINFORCED WITH 14 GAUGE END CHANNELS FOR SUPERIOR STRENGTH AND DURABILITY. 1-3/4"" SQUARE EDGE BENCH TOPS WON'T CRACK OR BUCKLE. FIXED HEIGHT WORK BENCHES KEEP THE WORK SURFACE 40H. LEGS ARE REINFORCED WITH CROSS BRACING FOR EXTRA STRENGTH AND RIGIDITY. MOBILE WORK BENCH LEGS FEATURE REMOVABLE DUPLEX KNOCK-OUTS TO ACCEPT ELECTRICAL OUTLETS (NOT INCLUDED). FINISHED WITH SCRATCH RESISTANT GRAY BAKED ENAMEL. MOBILE BENCHES ARE EASY TO MOVE ON 5"" CASTERS (2 RIGID 2 SWIVEL WITH BRAKES).