Features and Benefits: Made In USA; May eliminate the need for a screw extractor; Sizes: 1pc each: 1/8", 5/32", 3/16", 7/32", 1/4"; Left hand drill bits may loosen the broken stud; Drills Stainless Steel and Titanium Alloy; Sizes: 1/8, 5/32, 3/16, 7/32, 1/4;