Features Used to Removing Screws: The kit contains 10 screw removal sleeves, which can help remove nuts, bolts, screw heads, studs, etc. It is brand new, high-quality, reliable and safe. With Spiral Cutting Teeth: These nut extractors have spiral cutting teeth to provide good grip for removing round or damaged screws, with stable performance and strong practicability. Durable Material: Made of chrome alloy steel, with high strength and wear resistance, not easy to deform, fine workmanship, smooth appearance, and long durability. Use with Electric Wrench: These screw extractor sockets can be used with metric electric wrench or socket to facilitate rapid work and bring convenience to your life. With Aluminum Box: Equipped with aluminum box, these nut extractors can be well fixed and stored, easy to use at any time, with wide functions and obvious effects. Specification: Item Type: Nut Remover Set Material: Chrome 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