Hoppes Viper .40-.41 Caliber Boresnake: * With the BoreSnake Viper it features 50 percent more scouring power, a coneshaped bore guide for quicker, easier alignment and a designated lubrication zone on the handle * 1 pass with the BoreSnake Viper loosens large particles, scrubs out residue, and swabs your bore spotless * Just add some Hoppe"s Elite Gun Cleaner of your choice for a 1-step triple-action bore shine