The Original Chain Locker® is a universal chainsaw chain storage case for all chains up to 20" saw blades. 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 polypropylene and all hinges and latches are manufactured with 1/8" diameter stainless steel rods. Hinges are also frame reinforced. MADE IN THE USA. Patented. www.chainlockerpatents.com