Using the Druid Descender is easy. First, make sure you've selected the right semi - static rope within the 9.9 - 11 mm diameter range. Attach it to your rope access or rescue setup. When descending, the auto - braking function will keep you safe. Just be careful not to pull the handle too far to avoid triggering the anti - panic feature. For rope ascent, the smooth action of the descender on the rope will make the process easier. If you need to quickly slide the rope when there's no or little load, use the trigger to de - activate the cam. Regarding safety, always check the certifications to ensure it meets your requirements based on your weight and the type of operation. Also, don't exceed the maximum weight limits. For maintenance, regularly inspect the body, lever, and mechanical parts for any signs of wear or damage. Since it's made of aluminum alloy and stainless steel, it's fairly durable, but keeping it clean and dry will extend its lifespan. Store it in a cool, dry place when not in use.