The 80 mm Single Cheek Plain Bearing Block with Quick-Lock is designed to lead a line to a winch and allow for the line to be temporarily locked with a spring-loaded locking arm. This way, the winch can be used for other purposes. Another typical application is to secure inactive spinnaker sheets / guys to prevent them to become unreeved. Also suitable to angle and lock a jib track control line.

The locking arm is spring-loaded to prevent accidential locking. 

408-001-18R rotates anti-clockwise when tensioning the line.

It features a glass fibre reinforced sheave with polymer bushing, stainless steel strap for durability and glass fiber reinforced composite cheeks to prevent jamming. 

BlockType: cheek,single,quicklock
SubType: cheek single quicklock
Breaking Load: 4000 kg
Safe working Load: 2000 kg
System: PBB80
Max line size: 16 mm
Mounting: 3xM8