The Sig-Sauer 8 Round 1911 9MM Magazine will work in all 1911 pistols chambered for 9mm Luger. It is made of steel with a blued finish and holds 8 rounds of ammunition. You can never have too many spare magazines on hand! SIG Sauer is a leading manufacturer of quality firearms. Their SIGTAC line of weapons accessories includes holsters, lights and lasers.