Every element of the New ISC 200 Series Pulleys showcases the craftsmanship and attention to detail that they have received.

ISC new Patent Pending “SafeLock” system builds upon the reliability and ease of use that our customers expect from ISC pulleys.  The new SafeLock locking mechanism achieves an extremely low profile design while maintaining the quick action of a SpringLock.   

Coupled with a unique axle/frame interlocking design using heat treated hardened stainless steel axles which reduces the inherent tendency to deform or flex under extreme loads.  What ISC achieved are pulleys that are up to 150% stronger than their predecessors and are built to withstand even the toughest rigging jobs with ease.