Screw Extractor Set Extractor Type Straight Flute Screw Extractor and Drill Bit Number of Pieces 10 Drill Size 1/4 in 19/64 in 5/32 in 5/64 in 7/64 in For Bolt Size 1/4 in to 5/8 in Material - Machining High Speed Steel Container Type Case Drive Size 1/4 in