Wm Harvey 092610 4-In-1 Brush Wm Harvey 092610 4-In-1 Brush Features:;A combination brush that cleans and prepares joints for solder;Removes dirt and debris from connecting parts, use Harvey"s Abrasive Sandcloth to polish end of tubing after cleaning away corrosion with brush;Joints to be soldered must be free of any grease, grime, corrosion, hand prints or contamination in order to form a seal;Ideal battery post and terminal cleaner;Saves space, combines four tools into one;1/2" and 3/4" inside diameter;5/8" and 7/8" outside diameter;Carded