2 in. x 1/4 in. Dia. High Carbon Steel Spiral Screw Extractor 4 in. SOLD ASCase of 10 PRODUCT DETAILS Extractor Size: # 2Drill Bit Diameter: 1/4 in. Material: High Carbon SteelShank Diameter: 1/4Number of Pieces: 1Application: Designed To Remove Broken Studs Bolts Socket Screws and Fittings.