Fusion Pro-Series, Firing pin stop plate for 9mm, 38 Super, 40 Cal, & 10mm slides. Full profile standard profile, radius bottom. All machined from Stainless steel Bar stock, heat treated in matte finish. The top of the slide stop is cut to provide clearence for bomar style. These are Top Quality Professional Series Parts; Made from the best materials and processes available in today’s market. NO-MIM.