APPLICATIONS: Professional Red Straight Line Laser, ultra-precision grade for professional leveling, alignment, adjusting, positioning, measuring and targeting device. Wood processing. Metal processing. Stone processing. Textile industry. Food industry. Automotive industry. Medical science Wood processing. Metal processing. Stone processing. Textile industry. Food industry. Automotive industry. Medical science. Legal Disclaimer: Please carefully read this statement before buying this item. This is an electronic component or replacement part for professional leveling, alignment, adjusting, positioning, measuring and targeting device etc. This is a component, which is exempt from complying to 21 CFR 1040. Because this is simply a component, which is sold to a manufacturer of an electronic product for use as a component in such electronic product. The professional who purchase this component should be quite aware of that your complete laser products which comply to 21 CFR 1040. This item is only intended for use only by professionals, trained operators, laser manufacturers or other qualified users. Any individual or company who buy this item to build or produce laser product, please be sure your products are in compliance with FDA regulations:21CFR1040.10.