Fits Standard Commander and Officers Government Model 1911 frames. 45 Auto. One-piece moldings lend themselves to decontamination procedures. Cut for ambidextrous safety, the thin grips attach with standard grip screws. Square bottom for flush fit with the mag guides and chutes. Injection molded nylon-based rigid polymer, heavily textured (the gritty feel replicates the texture of skateboard tape) for optimum hand-held stability. .45 Automatic. Made in the USA. Falcon Industries. ER4500