[Easy Out Damaged Screw] As an upgraded version of the double-head design, the screw 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 [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 [Enduring Material] This screw extractor tool made of heat-dealing high quality chromium-molybdenum steel, enduring and not easily damaged. The spiral pattern design provides enough clamping force for easy removal [Faster to Remove] These striped screw 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 27-piece set includes 1/8 inch, 5/32 inch, 3/16 inch, 7/32 inch, 1/4 inch, 9/32