The sheaves of ratchet blocks have machined "V" facets which provide added grip on loaded sheets when trimming, yet allow for controlled easing.
• Featuring Injection molded long-grain fiber construction
• Machined aluminum sheave with an above average 10 facets for secure line holding
• Delrin™ ball bearings for low-friction
• Swivel head with the ability to lock-in place
• On/Off switch located on both sides for easy operation