Laser - 3744 Combination Screw Extractor & Drill Set 5 x spiral extractors. 5 x HSS drill bits. Sizes: 5/64" (3mm), 7/64" (3.5mm), 5/32" (4mm), 1/4" (6.5mm), 19/64"(7.5mm). Titanium coated drill bits. Short size allows access to awkward areas.