1.TOOL INTRODUCTION Damaged bolt extractor 3/8' inch drive. It is suitable for most drive tools and can be used with manual or pneumatic impact wrenches and ratchets as well as adjustable wrenches and flat wrenches. Heat treated alloy steel is very Sturdy and chromeplated, will not be damaged by highstrength work, and will add lubricant to the internal rotating threads to provide better protection against rust and wear. 2.OPERATIONAL GUIDANCE Simple operation does not need to be considered. Place the stud extractor on the stud and turn the bottom hex flat nut counterclockwise to tighten the jaws. After the jaws hold the broken bolt or stud firmly, continue to rotate the stud counterclockwise until it is removed.Then release and separate them in a clockwise direction. 3.EFFICIENT VERSATILE This stud removal tool is easy to operate and can help you get more rest time, whether it is the exhaust manifold, fuel plug, broken bolts, or broken, painted, rusted fastening screws The posts are effectively removed, but the threaded surface may be slightly worn due to the strong clamping force. 4.TRADITIONAL Traditional bolt extractors are limited in size, and too many types of extractors waste space and cost. It's too much trouble for your mood, so we designed an autoadjustable extractor that easily clamp the damaged studs for stripping, saving you valuable time,It is definitely a great addition to your toolbox.