ISMI guide rods are machined from stainless steel and utilize a button head screw to retain the spring when the assembly is out of the pistol. This allows the shooter to dis-assemble the guide rod for spring replacement or maintenance. Designed for use with ISMI's single flatwire spring replacement. Note: Replacement of this guide rod may make your gun illegal for IDPA SSP division competition FeaturesStainless Steel constructionProvides longer life and smoother cycling over stock plastic guide rodsMay also be used as a non-captured rod