Using these T - Motor T76s propellers is easy. First, make sure your drone has an M5 center hole that matches the propeller's mounting size. Then, carefully attach the CW and CCW propellers to the correct motor positions on your cinewhoop. When flying, you'll notice the efficient performance and powerful thrust, which are great for smooth and dynamic flights. As for precautions, always check the propellers for any signs of damage before each flight. If you find any cracks or chips, replace them immediately to avoid potential flight issues. For maintenance, keep the propellers clean. You can gently wipe them with a soft cloth to remove any dust or debris. Store them in a safe place to prevent them from getting bent or broken. With proper use and care, these propellers will serve you well for a long time.