Multi-function spanner tools Dilwe cross spanner model for M2/M2.5/M3/M4 screw and nut Made of high quality metal material through mold design, it is durable and durable. sustainable. Handy tool for RC airplane and car. It is so small that you can easily carry it. < /ol > The wrench can be applied to M2/M2.5/M3/M4 bolts and nuts. Functions