Extreme Max Jack In A Box Trailer-Mounted Emergency Jack & Lug Wrench Set - Silver Bolt-on steel box with scissor jack and lug wrench; Extreme Max Jack in the Box Complete Tire Changing System - Silver Storage box fits most trailer tongues, and any trailer frame 3" wide by 5" high 1-1/2 ton capacity scissor jack Lug wrench fits all trailer lug nuts