• Our blocks are all equipped with high load Torlon bearings in place of the usual Delrin bearings
• 2800 pound safe working load
• Torlon bearings don't distort under high loads providing less friction when it gets windy
• To prevent the line from twisting or binding the blocks in this kit are supplied with a feature to lock the rotation of the shackle
• Use an Allen wrench to tighten the set screw to lock rotation of the single blocks
• Use an open end wrench on the nut to lock the rotation of the double block

All blocks:
• Sheave Diameter: 2"
• Bearings: Torlon
• Safe working load: 2800 pounds
• Maximum Line Diameter: 1/2"

Shackle sizes:
• Single blocks: 5/16"
• Boom blocks: Custom U shape bail supports two blocks on one boom bail