100 Ton Aluminum Jack with 6" Stroke. This unit features a Locking Collar with Handle Pin to Assist in Locking Collar Release. The Collapsed (Minimum) Height is 15.6" and Maximum Height is 21.5". Aluminum Lock Nut provides Mechanical Load Holding for Extended Periods and there are more Threads for Greater Holding Strength. Equipped with Bolt on Hardened Steel Saddle and Base is the same as used with the AME-13121 Alu.Jack. Also uses the same Shut-Off Valve as the AME-13121.