Approximate Dimensions:
Overall: • Sheave diameter: 1-3/4"
• Maximum line diameter: 3/8"
• Safe working load: 1150 pounds
• Fore & Aft: 3-1/2"
• Top to Bottom: 2"
• Height: 1"
• Maximum line size: 3/8"

Hole center spacing center to center:
• Fore & Aft: 2-15/16"
• Top to Bottom Aft: 1-3/8"
• Top to Bottom Forward: 1-1/8"

We often use this block primarily to install single line reefing, mounted on the starboard side of the boom, as far forward as possible. You may find other uses anywhere a sturdy ball bearing cheek block is required.