The Torin JackBoss hydraulic bottle jack is welded and designed for residential and commercial use. The lifting range is 8.15" to 15.83" with a 6 Ton (12,000 lbs.) capacity. It features an adjustable screw top extension with a heat treated screw that allows a low pickup height adjustment and a maximum lift height. The heat treated saddle is serrated and provides a large lifting area and a secure grip while the rugged base adds stability and strength. The critical stress points are reinforced for added durability and dependability and help extend the life to 5000+ lifting cycles.