Bull ring copper 2.5" x 5/16" (64mm x 9mm)

Copper Bull Ring 2 1/2" x 5/16"

Self piercing copper bull rings complete with locking pin.  These can be applied by hand (although they are self piercing it is easier after using a bull ring punch which can be found by clicking here) or with a bull ring applicator (which can be found by clicking here).

These come with a locking screw that snaps off when screwed home, revealing a screwdriver slot for future tightening or removal.  Sizes are nominal outside dimensions.