1. TOOL DESCRIPTION: The stud extraction tool uses a 3/8 inch driver for 1/4 inch to 1/2 inch (6 mm to 12 mm) studs. This extractor tool is a modified metal chuck that holds the stud well instead of the drill bit. It is used with impact wrenches and ratchets. It can also be used with flat wrenches, adjustable wrenches, sockets and locking pliers 2. STRONG AND DURABLE: The broken bolt remover is made of heat treated alloy steel, which has high strength, high abrasion resistance and good corrosion resistance. It is also chrome plated and will not be damaged by high intensity work. The three large internal claws are powerful enough to effectively remove damaged bolts from exhaust manifolds, filler plugs, and other places where they are needed 3. TRADITIONAL : This stud extractor will help you the most compared to traditional broken stud Remover that are limited in size and variety. Featuring a universal design, it easily clamps down on damaged bolts for stripping. Reduces your hassle and saves time 4. EASY TO USE: This stud removal tool is simple to operate and can easily remove studs. Place the stud extractor on the stud, turn the bottom hexagonal flat nut counterclockwise and tighten the jaws. After the jaws have firmly clamped the broken bolt or stud, continue to rotate the stud counterclockwise until it is removed. Then loosen and separate in a clockwise direction