The US PRO Bergen 25pc Screw Extractor Drill And Guide Set is designed to help you extract broken or damaged screws and bolts easily without damaging the surrounding material. Suitable for a range of thread sizes, this comprehensive set provides the tools needed for a variety of extraction tasks. Features : Extracts screws and bolts with ease, preventing further damage. Suitable for thread sizes from 5mm to 16mm. Removes broken fasteners without breaking or jamming. Permits highest torque expansion , ensuring reliable performance during extraction. Specifications : HSS drill bits : 1/8", 3/16", 1/4", 5/16", 11/32". Extractor pins : #1, #2, #3, #4, #5. Drilling guides : G1, G2, G3, G4, G5, G6, G7, G8, G9, G10. Extractor nuts : N1, N2, N3, N4, N5. Brand : US PRO