Beretta 12 or 20 gauge 680 Series Hammer Spring Guide Assembly. Included in this assembly are the hammer spring guides, the hammer springs, the hammer spring guide nuts and hammer spring guide bushings. Only available in sets of two. Not sold individually. Fits 680, 682, 686 & 687 12 or 20 shotguns Note: It is recommended that all Beretta parts be installed by a qualified and trained gunsmith.