Features: High Quality --- Damaged nut and bolt extractor made of high mechanical strength chrome-vanadium alloy steel with a black oxide finish to resist corrosion, providing superior strength for better tensioning and durability. High Performance --- The improved spiral flute cutting edge profile for a secure connection offers a reverse grip for maximum power. 2-Way Operation --- The vacuum socket has two drive ways: a 3/8" square drive in the center and a hex drive on the outside. The hex drive is used in conjunction with sockets, pliers, open-end wrenches, and locking pliers, etc., while the 3/8" square drive can accommodate a regular 3/8" ratchet or extension. <p>EQUIPPED --- Total 10 standard metric socket sizes including 9/10/11/12/13/14/15/16/17/19mm. Extremely effective for removing rust, stubborn nuts, and even rounded or stripped studs, especially oil drain plugs. An extension is included for removing the damaged fastener from the socket. <p>Convenient Selection --- Each socket is engraved #1 or #10 for better visibility. An indispensable tool for oil drain plugs, oil dome bolts, exhaust manifold nuts, automotive, vehicle, and engine work, etc. <p> <p>Features: <p>Material: Chrome Vanadium Alloy Steel <p>Removal No.: No. 1/2/3/4/5/6/7/8/9/10 <p>Inner Size (Fits to Remove Hex Size): 9/10/11/12/13/14/15/16/17/19mm <p>Outer Hex Size: 16/16/19/19/19/22/22/25/25/27mm <p>Item Weight: 240g / 8.5oz <p>Package Weight: 246g / 8.7oz <p>Package Size: 15 * 10 * 3cm / 5.9 * 3.9 * 1.2in <p> <p>Package List: <p>10 * Nut Extractors <p>1 * Wrench