The small, clean storing, and self-contained bore boss should be kept in your gun case or range bag to make taking care of your gun a whole lot easier. Quickly flip open the case, feed the cable through the bore, clip to the ergonomic handle and pull the bore boss through your bore. Ultra-tough and ultra-portable, the bore boss is meant to go wherever your gun goes. Let's face it-cleaning your gun can be downright pesky and the last thing you want to do after a cold afternoon in the mountains, a muddy morning in the swamp, or a Dusty day on the range. Take the mess and hassle out of cleaning and use the bore boss each time before you throw your gun in its case to reduce fouling buildup and to ensure your firearm is ready to perform. Welcome to the new era of gun cleaning, this is modern gun maintenance. The bore boss is a single caliber pull through cleaning solution. Please select the caliber specific to your firearm above..