The ultra-fine tip allows precise application, and the filament tip enables precision burns on fine threads and knots. Ideal for bead and rope weaving projects or other detailed tasks. This thread zapper uses 1xAA (1.5V) battery, providing multiple hours of use. Align the battery with the pen body and insert it (battery not included). Insert the replacement tips into the thread pen, then press and hold the switch for 5 seconds to activate. After use, allow the tip to cool and replace the included cap. The replacement tip is compact when not in use, saving space. If the tips are loose in the pen, gently bend them for a tighter fit. The tungsten wire tip may soften and deform when heated, and could break if mishandled. When not in use, always replace the pen cap to protect the tip and ensure longevity. Color: Silver Material: Metal Package Contents: 1 set Cordless Wire Burner Pen Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.