The Line Strong 3R is a robust die‑cast Heavy Duty Safety Rope Pull switch designed to protect long conveyor lengths where protection is required up to 125m using two switches or up to 100m using a single switch. The die‑cast housings are robust to survive indoor or outdoor use. A bi‑color LED ensures switch status can be seen easily from a distance. They have 4NC 2NO contacts to ensure flexibility with all modern control applications.