6 Screw Extractor Sets - The screw extractor sets (#0, #1, #2, #2, #3, #4) work with any drill bit and any size screw or bolt. This damaged screwdriver can remove damaged, stripped or broken screws of all sizes. Portable - The screw extractor kit comes with a sturdy tool case. It is very convenient to put in your pocket or carry around. Multiple Sizes - This bolt and screw removal bit set contains 6 double-sided metal drill and extractor bits; The drill bits range in size from 2mm to 6.2mm in diameter while the extractor bits range in size from 2.3mm to 12mm in diameter. Storage Box - Ideal tool case to organize and hold drill bits and extractor bits for any craftsman, dad, husband, boyfriend or wife Sturdy and Tough - Made with clean steel technology, these screw extractors have high HSS strength and HRC hardness allowing fast drilling speed and better gripping power for efficient screw extraction. Practical Gadgets - is committed to providing long-lasting quality tools; Reversible