The ESCO Heavy-Duty 20-Ton Screw Style Jack Stand is the only stand that allows you to control the exact support height. This professional swivel-style jack stand has infinite height possibilities with its built-in easy to turn screw adjustment handle. This feature allows you to set your exact desired height from 16. 5 in. x 26. 5 in. range. Stands are sold individually. Minimum height is 16. 5". Maximum height is 26. 5". Solid 13 x 13 in. base for sturdy performance.