<b>1. </b> This router bits are designed for portable and desktop woodworking machines and cannot be used on machines such as electric drills and drill presses. <br> <b>2. </b> Can be used for hard wood, softwood, synthetic board and so on to produce a smooth surface, but to avoid processing copper, iron and other metal materials and sand, stone and other non-wood materials. <br> <b>3. </b> If you need to use a collect, please select the appropriate size collect. <br> <b>4. </b> Use appropriate glasses and ear protection when operating.body, clothes and other debris can not be close to the working tool. <br> <br> <b>The maintenance of router bits: </b><br> (1) The router shank is in high-speed during operation, timely replenishment of lubricating oil is very important for the service life of the shank, so a little lubricant should be added after 2-3 hours of work. <br> (2) Keep the router bits clean. After use, remove the resin, wood chips and other contaminants from the wood and use standard industrial solvents to clean the bits.