... or multiple jacks systems and can be driven by electric or manually, fully synchronization.Speed of Travel* Fast ... used as a fixed stop.Accessory:bevel gearboxes,hand wheel,electric motor,travel nut,protetive tube,rubber bellows,limited switches ... , Sluice gate, Theatre stage, Slitting line, Precision leveler, Powered straightener, Paper machines, Food processing machines, Textiles machines etc.