ECONOMY TRAILER STABILIZING JACK STAND 50,000 LB. STATIC CAPACITY - TJ70 HELPS PREVENT UPENDING SEMI-TRAILERS WHEN THEY ARE NOT CONNECTED TO A TRACTOR DURING LOADING AND UNLOADING OPERATIONS. ALSO USE TO LEVEL TRAILERS PARKED ON SLOPED GROUND AND TO PREVENT LANDING GEAR FROM SINKING INTO A SOFT SURFACE. USE JACK STANDS SINGULARLY OR IN PAIRS. MEETS OSHA REQUIREMENTS 1910.178(K)(3) THAT STATES "FIXED JACKS MAY BE NECESSARY TO SUPPORT A SEMITRAILER AND PREVENT UPENDING DURING THE LOADING OR UNLOADING WHEN THE TRAILER IS NOT COUPLED TO A TRACTOR." THIS JACK HAS TWIN HANDLES FOR FAST, EASY 44" TO 51" HEIGHT ADJUSTMENT. IT FEATURES A 5" X 5" TOP PLATE AND A 14" DIAMETER BASE PLATE FOR STABILITY. 50,000 LB. STATIC CAPACITY AND 5,000 LB. LIFTING CAPACITY. INCLUDES CONVENIENT CARRYING HANDLE.