Great for short stroke cleaning applications when using J-B Bore Cleaner and other paste type cleaners. The stops prevent patches from coming out at the muzzle. Many shooters use them when treating a barrel with a bore conditioner. Three sizes available to fit Dewey and most other cleaning rods. Small stop fits 22-6.5mm caliber rods, large stop fits 27-30 caliber rods, and the X-Large stops fits 35 caliber rods.
Sinclair, Issue:4A, Page:135