Irwin  Hanson  ST-7  Straight Screw Extrac *Sub Brand: Hanson *Extractor Size: ST-7 *Product Type: Straight Screw Extractor *Packaging Type: Carded *Number in Package: 1 pk *Shank Diameter: 9/16 in. *Drill Bit Diameter: 9/16 in. *Material:Carbon Steel *Removes Bolts and Screws: 7/8 in. and 5/8 in. BSP*Designed for softer materials or thin-walled pieces such as pipes and fittings. Design eases extraction because it does not expand the material as you remove it. Removes both left-hand and right-hand threaded parts.