Hoppe Slotted Tip - 410/20 Gauge 1441 HOPPE'S knob end for calibers for cleaning your firearm. It is compatible with all HOPPE'S cleaning rods except the caliber cleaning rods. The HOPPE'S allows you to connect cleaning rods from rods to cleaning end accessories like brushes and mops. Features: - Can be used with patches - Compatible with all HOPPE'S cleaning rods - Made of quality materials - 100 percent designed and tested - Hoppe's No. 9 Conversion Adapter permits interchangeability with non-standard size threads - Intended for use with .410 to 20-gauge - This is a great, easy to use adaptor