Features Used to Removing Screws: The kit contains 10pcs screw remover sockets, which can help to remove nuts, bolts, screw heads, studs, etc. With Spiral Cutting Teeth: These nut removers have spiral cutting teeth that provide a good grip for removing round or damaged screws. Durable Material: Made of vanadium alloy steel, with high strength and wear resistance, and not easy to deform. Use with Electric Wrench: These screw remover sockets can be used with metric electric wrenches or sockets for quick work. With Aluminum Box: Equipped with an aluminum box, which can well fix and store these nut removers, easy to use at any time. Specification: Item Type: Nut Remover Set Material: Vanadium alloy steel Purpose: Screw remover Colour: Black Socket Height: Approx. 2.7cm / 1.1in Socket Size: Approx. 9mm / 0.35in 10mm / 0.39in 11mm / 0.43in 12mm / 0.47in 13mm / 0.51in 14mm / 0.55in 15mm / 0.59in 16mm / 0.63in 17mm / 0.67in 19mm / 0.75in Package List: 10 x Nut Remover 1 x Aluminum Box Note: Please wear protective gear when removing the damaged nut to prevent the debris from splashing and hurting yourself. Package List 10 x Nut Remover 1 x Aluminum Box