For removing broken screws and bolts. Set includes 5/64 in, 7/64 in, 5/32 in, 1/4 in and 9/32 in. Set offers a strong value on the 5 most common screw extractors and is much less expensive than purchasing the five sizes separately. Set offers a strong value on the 5 most common screw extractors and is much less expensive than purchasing the five sizes separately.