The 9mm-.358 Cal patch jag is specifically engineered for cleaning .358 caliber barrels, including but not limited to 9mm, .38 Special, .357 Magnum, .38 Super, .35 Remington, .35 Whelen and .356 Winchester. These patch jags apply a solvent- or bore paste-treated patch against the barrel and into the rifling to effectively remove carbon, plastic and copper deposits from the bore. For demonstration purposes, we used this patch without solvent and pushed it through the barrel once. As evidenced, these jags outperform any other jag available on the market. The proof is on the patch. Beyond cleaning, our jags are also suitable for oiling the bore for storage and removing oil before firing. Our rifle jags are compatible with all rods featuring standard 8-32 threads. Additionally, we recommend purchasing USP bore paste and round TCS patches for .30-.45 Cal rifles and pistols. TCS round patches are ideally sized for use with this jag, while other patches may present fit issues. Square patches are not recommended for use with our jags. Precision-engineered patch jag crafted from high-grade aluminum alloy for enhanced durability and optimal performance in cleaning and maintenance applications Solvent-resistant, durable O-rings Compatible with all standard cleaning rods