SHOP TOP WORK BENCHES PROTECT AGAINST STATIC BUILD UP AND WON'T WARP OR SPLIT. DURABLE SHOP TOP IS CONSTRUCTED OF A HIGH DENSITY PARTICLEBOARD CORE SEALED WITH A CATALYZED FINISH. SUPER STRONG MDF CORE. SANDED SMOOTH SURFACE SEALED FOR MOISTURE RESISTANCE. HEIGHT ADJUSTABLE WORK BENCHES OFFER 35-7/8 TO 43-1/2"" HEIGHT ADJUSTMENT TO MAINTAIN A PROPER WORK HEIGHT. INCLUDES 1-3/4"" THICK SQUARE EDGE SHOP TOP. 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).