Made of high quality materials, it has high hardness, is highly rust-resistant, durable, has a long service life and can be used for a long time. It is small in size and can be taken anywhere as a portable tool. Suitable for M2, M2.5, M3, M4 screw nuts and M4 nozzle can screw E3D nozzle. Can be widely used in home workshops, auto parts, woodworking, mechanics professionals, etc anti-slip design, reduce stress damage within certain limit. Specification: Material: Titanium Steel Length: about 48mm< br/> Width: about 24mm