Premium Material: Made of chrome-vanadium steel, ensuring durability and long-lasting performance. Versatile Compatibility: Compatible with both 3/8-inch impact wrench and ratcheting wrench, allowing for easy inseon of the wrench into the stud extractor. Adjustable Design: The extractor can be adjusted to fit studs ranging from 1/4-inch to 1/2-inch (6mm to 13mm) in size. Easy Operation: Featuring a 3-jaw design, this can easily clamp damaged bolts for stping, saving you valuable time. Wide Applications: This stud extractor is highly effective in removing threaded, broken, rusted, or stped studs. Color may vary