Features: brand new and high quality Stud extractor tool uses 3/8 inch-drive, best used with impact wrench and ratchet. Also compatible with with flat wrenches, adjustable wrenches, sockets, and locking pliers. This extractor tool is adjustable to fit studs that are 6mm to 13mm. Manufactured with a steel material and will remove broken and damaged threaded studs fast. This extractor tool is easy to operate and can help you get more rest-time, whether it is the exhaust-manifold, fuelplug, broken bolts, or broken, painted, rusted fastening screws The posts are effectively removed. Great workmanship, with strict quality control and quality assurance, high safety-factor, can be used with peace of mind. Specifications: Material: Steel Scope of application: 6-13mm Size:Apporx.40x74mm/1.57x2.91inches Package Includes: 1x Broken Bolt Remover note: 1.Please allow 1-2cm 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.