Fiber Optic Clamp, Heavy Duty. This clamp holds both ends of the fiber optic cable while you splice. Mounts on table or bench inside your trailer or truck. Clamp is approximately 15 inches at base, opening at top is approximately 8 inches. Condition is New, I handmake these in my shop from steel and aluminum, 500 lb clamps. This is for one fiber optic clamp. Thank you.