The Spinlock Compact Stanchion Lead Block is used on the line entry and exit stanchions.
Features:
Safe, compact design Reduces furling line friction
Unique tracker-ball angle adjuster for perfect sheave alignment
Complete with fastenings: easy to fit
Replacement sheave available
Specifications:
Line Diameter: 1/2" (12 mm)
Max SWL: 660 lbs) (300 kg)
Stanchion: 1" (25 mm)