The ultra-fine tip allows precise application. The filament tip works evenly on threads and knots. Ideal for bead and rope weaving projects or other everyday tasks. The thread zapper uses 1 AA (1.5V) battery. Provides multiple hours of use with a single battery. Insert the battery into the pen body according to polarity markings. Insert replacement tips into the thread pen, then press and hold the switch for 5 seconds to activate. After use, allow the tip to cool before replacing the cap. This replacement tip is compact and space-saving when not in use. If tips feel loose, gently bend them for a tighter fit. The heated wire tip may soften and deform if overheated; always use the protective cap when not in use to prevent damage. Color: Silver. Material: Metal. Package includes: 1 cordless wire burner pen. Note: Color may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.