Ultra-Fab Products 48-979031 - Ultra Scissor Jacks - 30" with Hand Crank Ultra scissor jacks give added stability to travel trailers, fifth wheels, horse and cargo trailers. Powder coat black finish resists rusting. Large 5" X 9" footpads combat sinking and tilting. Extends from 4 3/4" to 30". Twin pack includes crank handle. bolts or welds to frame (bolts not included). Manufacturers Lifetime Warranty