Using this Milwaukee Hackzall Saw is quite simple. First, make sure the saw is turned off. Then, if you need to change the blade, use the keyless QUIK - LOK™ blade clamp. Just open it up, insert the new blade, and close it. When you're ready to start cutting, hold the saw firmly. You can adjust the speed with the variable - speed trigger according to the material you're cutting. For softer materials like drywall, you can use a lower speed, and for harder materials like wood or PVC, a higher speed might be better.
When using the saw, always wear safety goggles to protect your eyes from flying debris. Don't force the saw through the material; let the blade do the work. Also, keep your hands away from the blade at all times.
For maintenance, after each use, clean the saw. You can use a dry cloth to wipe off any dust or debris. Check the blade regularly for wear and tear. If the blade is dull or damaged, replace it promptly. Store the saw in a dry place to prevent rust and damage to the all - metal gear case. And remember, since this is a tool - only model without a battery, make sure you use a compatible 12V Lithium - Ion battery for the best performance.