The horseshoe is a spacer ring for incompatible keyways. Instead of trying to pull a keyway off of your slider or riser, add this ring and create your own keyway slot.
Allows you to adapt Chapman accessories to Fisher, Modern, other manufacturers, and vice versa.
This can also be used as a spacer for sliders when using a low profile leveling head to prevent interference.
Made from 6061 aluminum with a stainless steel keyway and black anodizing.