#1 straight extractor. Remove broken screws, bolts, pipes, and studs. Made of special tool steel. Sharp, straight tapered flutes bit into work without building. Drill size to use is permanently marked on shank of extractor. Carded for easy display. Extractor No. 1. Screw size: 1/4", 5/16" No. 53602: Extractor No. 2. Screw size: 3/8" No. 53603: Extractor No. 3. Screw size: 7/16" No. 53604: Extractor No. 4. Screw size: 1/2", 9/16" No. 53605: Extractor No. 5. Screw size: 5/8"