ISC RP257 Large 1" Forged Aluminum Rigging Block

The ISC RP257 is the largest rigging block from their Next Generation 200 Series arborist blocks with a maximum rope diameter capacity of 1 inch. ISC Rigging Pulleys are designed and manufactured in the UK, at their factory based in North Wales, where they have been crafting industry leading safety components and “Solutions in Metal” for over 50 years. 

How could ISC make their industry trusted Rigging Pulleys even better?  They knew our customers most valued the strength and reliability of the pulleys and the massively popular SpringLock locking mechanism.  So the team took the challenge and delivered improvements on these features.

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