Screw Extractor Set, Extractor Type Multi-Spline and Bolt Extractor and Drill, Spiral Flute, Number of Pieces 48, Drill Size 1/2 in, 1/4 in, 1/8 in, 11/32 in, 13/32 in, 15/32 in, 19/64 in, 3/16 in, 3/8 in, 5/16 in, 5/32 in, 5/64 in, 7/16 in, 7/32 in, 7/64 in, 9/32 in, For Bolt Size 1/2 in, 1/4 in, 11/16 in, 3/4 in, 3/8 in, 5/16 in, 5/8 in, 7/16 in, 9/16 in, Material - Machining Carbon Steel, Container Type Case, Drive Size 1/4 in