[Spiral Left-Hand Design] This hex head multi-spline bolt extractor adopts spiral left-hand design, providing excellent grip and faster threading speed. It provide you with great convenience [Easy Out Damaged ] As an upgraded version of the double-head design, the extractor kit can be connected directly with a wrench without connecting socket. It is more convenient and quick to solve the difficult problem of removing damaged bolts [Enduring Material] This extractor tool made of heat-dealing high quality - steel, enduring and not easily damaged. The spiral pattern design provides enough clamping force for easy removal [Faster to Remove] These striped removers are useful for both power tools and hand tools. The high-density spiral design helps remove damaged or freeze screws, bolts, nuts, studs, fittings, threaded pipes and pins faster [Multiple Diverse Size] The 15-piece set includes 1/8inch, 5/32inch, 3/16inch, 7/32 inch, 1/4 inch, 9/32 inch, 5/16 inch, 11/32 inch, 3/8 inch, 13/32 inch, 7/16 inch, 15/32 inch, 1/2 inch, 3/8 inch -1/4 inch hex adapter, 3/8 inch -1/ 2 inch impact adapter. All sizes are clearly marked on the socket for easy identification, Manufacturer: Littimoon