Heavy duty OTR screw style jack stand; Screw Style Stand makes it Easy to Hold Load at Desired Height and Secure with Locking Collar; Adjustable screw for height Extension and Retraction; Quick adjustment to desired heights; Sold each; Capacity: 20 tons per stand; Min Height: 26" (665mm); Max Height: 46" (1170mm); Weight: 87 lbs (41kg