... or metal • Drill bit and extractor in one tool extracts fasteners fast; use in reverse only with 3/8" variable speed reversible drill • ... Compatible with quick chuck systems or chuck directly ... No.1, No.2, No.3, No.4, No.5, No.6Metric Drill Size: 2mm, 3mm, 4mm, 5mm, 7mm, 10mm 12 pcs Screw extractor set