A quality 3pc set of the most common sizes used in miniquads.
Contains 1 each of 1.5, 2 and 2.5mm hex drivers
1.5mm fits M2 socket cap screws (commonly used to mount 11xx and 14xx motors)
2mm fits M3 button cap screws (standard for frame parts)
2.5mm fits M3 socket cap screws (standard for frame parts)