Mechanical Jack Features: 1)Capacity: 1.5T to 20T 2)Quick braking,safe and reliable 3)Small turning force 4)Sturdy structure QJC-A Gear & Rack Mechanical Jack Features:1)Capacity from 1.5T to 20T2)Quick braking,safe and reliable3)Small turning force4)Quick lift,high working efficiency5)Smooth transmissions,no jerks6)Sturdy structure,light weight