Works with any shape of nut or bolt. Compatible with all types of bolts and nuts The spanner size can be extended from 9 to 45 mm. Ergonomic design: convenient for working in tight spaces. The red part of the key is made of rubber material, so it prevents the key from falling down. Easy to use: no more guessing about bolt or pipe sizes, fully adjustable with one-handed pressure. Coverage area: instantly holds pipes and fittings from 9 to 45 mm. The magic key is completely versatile and can be used for industrial and professional work. You can tighten any screw with this magic wrench. You can also use this key for housework. Features: Type: multifunction key. Material: high carbon steel. Length: 293mm. Width: 46mm. Thickness: 12mm. Available sizes: 9 mm45 mm. Package Contents: 1 magic key. Warning: 1. Wear protective gloves and goggles for your safety. 2. Keep your fingers away from the jaw teeth. 3. Keep out of reach of children.