The hex key tool is precisely machined from a solid stainless - steel block, with grinding hardening treatment and sandblasting treatment, making it sturdy and durable. The four ends of the wrench are 2.5mm, 3mm hex keys and a flat - head screwdriver, which can meet the needs of daily repair and installation, and is especially suitable for photographers to install various equipment accessories. The cross - shaped design provides a greater torque during rotation and installation compared to ordinary wrenches and screwdrivers, making it easier and more labor - saving. It comes with a silver titanium steel chain. The necklace length is 23.5" (60mm) and the weight is 0.3oz (9g). It can be worn around the neck as an accessory for the cross - shaped wrench, reducing the risk of loss. There is a hole at one end of the flat - head screwdriver, allowing the cross - shaped wrench to be hung together with keys for convenient use. Length:58mm/2.3in. Width: 35mm/1.4in. Width: 5mm/0.2in. Net Weight:14g/0.5oz.