SEALED LEAK-PROOF EXCLUSIVE ENDURA PUMP WITH HARDENED CHROME PISTON AND RAM OFFERS SMOOTH TROUBLE-FREE OPERATION. STEEL ROLLER CHAIN MECHANISM OPENS AND CLOSES VALVE WITH PRECISION. BY-PASS VALVE HELPS PROTECT AGAINST OVERLOAD. SUPER-STRONG BOX FLANGED STRUCTURALLY REINFORCED TAPERED FORKS. CONVENIENT 3-STAGE (RAISE NEUTRAL LOWER) FINGERTIP CONTROL AND SAFETY LOOP HANDLE. INCLUDES GREASE FITTINGS TO HELP MAINTAIN PERFORMANCE. ARTICULATED 3/4"" AXLE ALLOWS LOAD TO MOVE SMOOTHLY ACROSS UNEVEN SURFACES. ENTRY ROLLERS EASE PALLET ENTRY.