Harken Carbo Blocks

Lightweight, Strong Design. Blocks are 30% lighter with a 60% higher working load than Classic blocks. Open AirBlock® design eliminates unnecessary material and weight.
Long-lasting protection. Ball bearings, sheave, and sideplates are UV stabilized with carbon black for maximum protection.
Three-Way Cam-Lock. Patented switch locks shackle in front or side positions, or lets block swivel to keep line from twisting.