The Muzzleloader Brass Cleaning and Loading Jag is all you need to make cleaning or loading your muzzleloader a breeze. The .40 caliber cleaning/loading jag comes with male and female 10-32 threads, that will fit most ramrods on the market. The Muzzle-loaders brand brass cleaning jag secures snuggly to the end of your ramrod, making cleaning the full length of your barrel easy and efficient.