The Original Chain Lockeris auniversalchainsaw chain storage case for all chains up to 20″ length. The Original Chain Locker has a single row design and will fit a minimum of 8 chains. Built for Durability. Each Chain Locker is built with UV enhanced polypropylene, and hinges and latches are manufactured with 1/8″ diameter stainless steel pins. Hinges are also frame reinforced. Don’t be fooled and don’t waste your money on overseas knockoffs. MADE IN THE USA. Patented.