Made of high quality stainless steel, polished surface without burr, which is durable and does not rust. | Double head design, one end is flat and the other is pointed, which is easy to use. | Three rows of holes can achieve the purpose of extending the tool deep into the lens barrel and fixing it with four round head screws. | It can be detached 25mm Lens to 130mm Lens. Great accessory for DSLR camera lens. | Comes with 4 hex screw and a hex wrench, it can be used to replace inner hex screws, use them to tighten the spanner opening tool.