Metal inserted gasket differed from metal bonded gasket by non expose of metal. In applications where high strength is required and just rubber is not sufficient, rubber is molded on the metal like m.s., s.s., alloys etc.  This increases the life of product and so the life of machinery.  We follow proper procedure while manufacturing like increase in area of bonding between metal and rubber, accurate machining of metal part, precise die or mold to avoid excessive rubber.  In many industries these gaskets are widely used for sealing application where most wear & tear is expected. Even it gives the strength so that rubber does not bend due inserted metal. Rubber can be used for high friction with low heat generation.