RCBS bullet lubes was specifically designed to eliminate leading and improve the accuracy of cast bullets. Handgun lube is a special non-toxic blend that is recommended for indoor use, as well as, outdoor use. These hollow sticks measure 1" x 4" and have a melting point of 115 degrees Fahrenheit. A lube heater is recommended for best results but is not required. Features: Works with bench mounted lubri-sizers that accept 1" x 4" lube sticksNotes: Lube heater is required for best results, but not requiredBullets should be clean and dry with all oils, grease and silicones removed for best adhesion