Check the listing for details. 10pcs Red light pen metal head cold connection tool light source connector. Color: silvery, Condition: New. Listed at 21.22 USD. Red light pen headThis metal pen head is an essential accessory of red light pen at present. It is suitable for all red light pens. For example: letter test red light pen, small red light pen, metal, plastic, pen type, etcProduct featuresIt is suitable for most optical fiber red light pens in the market. The wall is thicker and not fragile. It plays the role of protecting the ceramic tube inside. It is made of aluminum alloy.Function introductionSuitable for red light pen.usage methodRotate counterclockwise, remove the metal head at the front end of the red light pen, and then rotate it clockwise to install it back. After installation, turn on the power and turn on the light for test and inspection.common problemThe red light pen is not bright and the light is not concentrated. It may be scrapped because the small ceramic sleeve of the red light pen is damaged. When the laser of the red light pen is very bright, but the red light cannot be injected into the optical fiber, and the gap between the quick connector and the light pen is too large and shaking, it indicates that your ceramic sleeve has been damaged and needs to be replaced.Professional nameMetal pen head / light pen head / red light pen head / red light source pen headQuantity: 10pcs