Specification:Product Name: Damaged Bolt and Stud Extractor ToolApplication: 1/4 inch - 1/2 inch (6mm-12mm)Material: Heat Treated Alloy Steel Chrome FinishedInternal: 3 JawsRuggedness: HRC40-45 Features:1. This stud extractor is adjustable to handle studs that are 1/4 inch to 1/2 inch (6mm to 12mm) in size.2. Easily handle broken exhaust manifolds, filler plugs, starter bolt fillets, painted bolts, rusted fastening bolts, and more.3. This damaged bolt extractor is high-grade heat-treated alloy steel for for ultimate strength and longevity.4. The hexagonal flat can be used with manual or pneumatic impact wrenches and ratchets, quickly and easily removing damaged bolts and studs. Package includes:1 * Stud Extractor Note:1.Due to manual measurement, please allow a difference of 1-5g/1-2cm.2.Due to different displays and different lighting, the picture may not reflect the actual color of the item. Thank you for your understanding.