Features: Maximum grip: The reverse spiral groove is designed for occlusion. Metal material: Chrome-vanadium alloy steel is for stronger than tool steel, corrosion-resistant, not easy to rust, high hardness, no pollution, and can ensure a longer service life and longer durability. Metric and SAE sizes: 1/4 5/16 3/8 10 7/16 12 1/2 13 9/16 5/8 17 11/16 3/4 inches, available for metric and SAE sizes. The box size is 175x115x50mm. It can be used with most tools: with a 1/4 inch square driver, it can be used with manual ratchets, impact wrenches and air ratchets; Hexagonal wrenches, used for flat wrenches, pliers, adjustable wrenches, and sockets. Function: maintenance, home use. Universal design: suitable for almost all types of bottle caps. Specifications: Material: Alloy Steel Color :Black Size: Approx. 1/4 5/16 3/8 10 7/16 12 1/2 13 9/16 5/8 17 11/16 3/4 inches Note: 1.Please allow 1-2mm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Set Nut Extractor