The ultra-fine tip allows precise application, the filament tip makes precision even on the threads and knots. Perfect for completing bead and rope weaving projects or other everyday tasks. The thread zapper uses 1xAA (1.5V) batteries. Get multiple hours of use from this tool with just one battery. Align the battery with the pen body, and put in the 5th battery(Not Included). Insert the replacement tips in thread pen, then push and hold the switch for 5 seconds to use immediately. After you're done, let the tip cool and replace included cap. this thread burner II replacement tip is very compact when it is not applied, taking up no side position and saving space. If the replacement tips are loose when inserted into the thread burner pen, you can bend the tips a little to make them tighter. The tip of the tungsten wire become soft after the heat be easy to deform break, so in the case of non-use, please get used to the pen cap on the cover, in order to prevent breakage can not be used normally! Color:Silver Material: Metal Package Contents: 1 set Cordless Wire Burner Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.