Using the DeWalt DCS571B circular saw is easy. First, make sure you have a fully - charged DCB205 battery (sold separately). Attach the blade using the blade change key stored on - board. When cutting, adjust the bevel lever for 45 - degree cuts or use the bevel gear for 90 - degree cuts. You can use the rip fence for straight cuts and the removable auxiliary handle for better control. Remember to wear safety goggles. After use, clean the saw using a brush through the on - board dust port to keep it dust - free. Store the saw on the hang hook for convenience. Check the blade regularly for wear and tear, and replace it when needed. Keep the saw in a dry place to prevent damage.