Omega-Lift 10045W Bottle Jack is a welded bottle jack with 4-ton capacity that is designed for both residential and commercial use. Its serrated, heat-treated saddle provides generous lifting area and secure grip. With the lifting range of 8-1/4 in. to 15-1/2 in., it allows you to work in the confined space and fit under low vehicles, and the adjustable screw top extension adds the versatility to allow low pick-up height adjustment and maximum lift height. Fabricated from hard-cast steel with heat-treated critical stress areas, and the inner/outer welded structure delivers leak-free performance. And, the wide rugged base provides stability and strength. Critical stress points are reinforced for added durability and dependability. The pressure pump is designed to lift with minimal effort, Integrated with a patented by-pass mechanism and patented built-in by-pass device protects the hydraulic system that protects the hydraulic system from extending beyond limits. Material: Steel Capacity: 4-Ton Item Dimensions L x W x H: 8.125 in. x 4.313 in. x 3.813 in. Minimum Height: 8-1/4 in. Maximum Height: 15-1/2 in. Extension Screw: 2-1/2 in. Manufacturer Warranty: 1-Year 10045W welded bottle jack is covered with 1-Year manufacturer warranty from the date of the purchase.