1. It was designed for shutters and manual door.
2. It can be operate with manual slats and other shutter system.
3. Spring wire can make you lift shutters easier.
1. Wire diameter: 4.0mm ~ 7.0mm.
2. Length: 1 ~ 3.5ft.
3. Weight: 1.7Kg ~ 5Kg.
4. Material: steel.
5. Suitable for roller shutter or door.