TIPS: 2 replacement tips per package. Use with TZ1300 (ASIN B00HBXOUY) and TZ1500 (ASIN B01GUHHGQC) PRECISE: The filament tip makes precision burns even on the finest threads and knots. BATTERY OPERATED: The zapper uses 1xAA (1.5V). Get multiple hours of use from this tool with just one battery. EASY TO USE: Simply push the button and touch to your thread. After you’re done, let the tip cool and replace included cap. PROFESSIONAL FINISH: Burn excess string at the edge of the knot, creating a clean finish.