Using these Gemfan 1940 propellers is easy. First, make sure your motor is in the adaptive range of 0806 - 1105. Attach the CW propellers to the appropriate motor positions and the CCW ones to the others as per your drone's setup. When flying, these propellers can handle high - speed racing and freestyle flights, but avoid extreme weather conditions like heavy rain or strong winds. For maintenance, regularly check for any signs of damage such as cracks or chips. If you notice any, replace the propeller immediately. Clean the propellers with a soft cloth to keep them in good condition and ensure optimal performance.