The RP057 from ISC is a 3/4” capacity spring block perfect for the working arborist.
Compact design and the unique upper sheave opens and closes and secures easily.
Eliminates the chance of dropping a sheave.
The side plates are thick aluminum with a yellow powder coating to enhance the life of the block.
The side plates have been updated with rounded rope friendly edges.
Capacity: 3/4″ rope diameter
Sheave: 4 5/8″ diameter
Weight: 7.5 lbs.
WLL: 4,500 lb.
Breaking Strength: 45,000 lb.