Features: Brand new and high quality Upgraded Bolt Extractor Kit: Compared to the old extractor, this new screw extractor kit does not require the socket to be placed on the hexhead before spanners is used. It's more convenient, The 3/8 inch drive design makes the screw removal device suitable for hand tools, electric or pneumatic tools Multi-Size: The screw extractor sets ranges from 1/8 inch (3.5mm) to 7/8 inch (23mm). It has 1/32 inch increments and come with a storage box, which is very convenient to store these screw extractor. Chromium Steel: Each screw extractor is made of high hardness chrome steel and has been heat-treated for durability. Every etching size is very clear with high visiblity for quick identification. Powerful: This bolt extractor is designed with internal thread that has reverse spirals grooves designed can be occluded to provide maximums. Each surfaces is precisions machined and resistant to corrosion. Wide Application: This bolt remover is easy to remove the broken and stripped screws, bolt and slip teeth, or can be used with a variety of square drive wrenches for a wide ranges of applications. Specifications: Material: Steel Color: Silver Size: 3.5mm, 4.5mm, 5.5mm, 6mm, 7mm, 7.5mm, 8.5mm, 9.5mm, 10mm, 10.5mm Height:Approx.35.5mm/1.39inch Package Includes: 10Pcs Damaged Screw Extractor note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.