Welcome to Defender Canada! 
Schaefer Shackle Guard Item # 923268
Description
Schaefer shackle guards prevent snap shackles from jamming in spinnaker pole ends.
Features:
- Highly impact resistant
- UV Treated urethane
- Four 1/8" (3mm) holes for lashing to sheets or guys
Specifications:
- Outside Diameter: 3" (76mm)
- Inside Diameter: 1/2" (13mm)
- Thickness: 5/8" (16mm)
- Weight: 4 oz. (113g)