Features: Professional laser head with high speed, high precision and high stability. Bright blue light, easy for locating when engraving. Adjustable laser head, easy to adjust, ensure engraving with good quality and high efficiency. Laser head is more durable and stable after high temperature and long time aging. Suitable for Master series DIY engraving machine, easy to install. main applications: metal engraving, deep engraving, simple cutting, etc.It supports metal engraving including alumina oxide, copper and other non-reflective materials, depth of engraving (0.5-3mm wood), thickness of cutting(2mm).Supported engraving materials: Wood, gray paper, leather, bamboo, blackening plastics, rubber, alumina oxide, copper, etc. Note: It is not possible to directly engrave the metal with strong mirror reflectivity, which may cause injury to the operator or burn the laser.