1、Excellent Alloy Steel Material: This bolt extractor is made of excellent alloy steel material, which is strong and wear resistant, not easy to be damaged, and has a long service life. 2、Good Compatibility: This bolt extractor has a good compatibility and fits studs from 1/4 inch to 1/2 inch (6mm to 13mm). 3、Time And Labor Saving: This bolt remover can easily remove threaded, broken, rusted and stripped studs, which saves time and labor. 4、3/8 Inch Interface: This bolt extractor has a 3/8 inch interface and can be useful for clamping damaged studs which is very useful. 5、Compact And Portable: This bolt extractor is small in size and light in weight, which is very convenient to carry around and use.