2KINGS 1.9mm double copper crimps for using on your mono shooting line. Copper double crimps are best suited to European spearguns. When used with the correct crimping pliers, copper double crimps compress to a small diameter and are ideally suited for the small muzzle openings in euro style guns.

Always use the correct size sleeve for the job, and always use the correct crimping tool. Regular pliers will incorrectly crimp the sleeve crushing mono and severely reduce the line breaking strain.