The Rapid Jack is your best friend when it comes to fixing a flat tire or removing a wheel on your multi-axle trailer. Simply place the small end of the Rapid Jack under the closest good tire and drive up! NOTHING COULD BE EASIER! It can also be used as a jack wheel holder, a jack post block, and a pad block (see pics). Doubles as a wheel chock. Works great on trailers up to 30,000 lbs. Keeps you and your clothes clean Weighs only 6 lbs Use with TUFF Chock (part # 3605) for extra support when unhooking trailer on Rapid Jack 17" long, 6" wide, 7" tall Resists dirt, grease and oil Made in the USA LIFETIME PART REPLACEMENT! just pay shipping