Emax Eco II is great motor at an affordable price. The motor is very well made. Even in this price range, it uses 7075 alloy and the rounded N52 magnets commonly found on the best motors. The shaft is steel.
The 2004 2400Kv design is especially suitable for 3-4" drones using a 6S battery and 4" or 5" ultralights using a 3-4S battery. Thanks to the t-mount (propeller attachment on 2 screws), the motor retains a light weight of 16.4g.