This is a Birchwood Casey Patch Holder known as the Brass Slotted Tip, model BC-41371.
Since 1948" serious shooters" avid collectors and professional gunsmiths have relied on Birchwood Casey for shooting and gun care products that have stood the test of time. Birchwood Casey has pioneered innovative products with an unwavering dedication for quality.
Features:
Securely Holds Patches
Can Be Pushed Or Pulled Through Barrel