KHM-313 Laser Head with Mechanism DVD Laser Lens KHM-313 Portable Optical Lens for MODEL NO . : KHS-313A KHM-313AAA KHM-313AAM HOW TO USE The components replaced must be completely the same models as the origanl &Professional operation only . The laser head have anti-static point to prevent static burn laser tube as a security measure. It's better to wear an antistatic wrist strap or wash your hands before welding and installation. When using a high-grade anti-static soldering iron,you can remove the anti-static point directly, ordinary iron requires special attention, heat iron to reached soldering temperature,then remember to turn off the iron's power,prevent static of iron burn laser tube. Recommedation tool: soldering iron Color: As Shown Material: Plastic+Metal Package Contents: 1 x Laser Head 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.