【High Performance and Impact】Bolt nut remover made of high hardness chrome molybdenum steel, the inverted spiral flutes are designed to provide maximum gripping power. Various Sizes: Suitable for head sizes 9mm, 10mm, 11mm, 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 19mm, 21mm, 22mm, 24mm, 27mm . Easy to work: The 3/8 inch drive works with all standard ratchets, impact wrenches, sockets and power tools. It can be powered with a metric key or socket. Screw removers can also be used on screw heads and bolts are used. Metric & SAE Sizes: The bolt remover is precision engineered to easily remove damaged bolts, nuts, and screws, even if they’re detached or frozen. You can count on quality to get any job done faster, safer and a lot less frustrating! International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. 1. Spiral cut teeth provide good grip, remove circular or damaged