General description This 10PCS Screw Extractor and Left Hand Cobalt Drill Bit Set is an essential tool for removing broken or damaged screws, bolts, and fittings. It includes 5 left-hand drill bits and 5 alloy steel screw extractors, making it suitable for a variety of users including woodworkers, DIY enthusiasts, homeowners, mechanics, and artists. Technical specifications Material: High-speed steel Left-handed cobalt drill bit sizes: 5/64", 7/64", 5/32", 1/4", 19/64" Screw extractor sizes: #1, #2, #3, #4, #5 Storage box size: 14 x 20 cm Usage Ideal for removing broken or damaged screws, bolts, and fittings. Easy to use for various applications. Other information Comes with a storage box for easy transportability. High-quality metal materials ensure maximum strength and durability for long-lasting usage.