Features: These extractors will remove most kinds of damaged, rusted, broken or stuck screws from any wood or metal surface. Made from HSS 4241 and black oxide coated for extra hardness and long durability. Produced from GCr15 bearing steel. 6 pieces heavy duty screw extractor with different sizes to meet multiple needs. 6 pieces high hardness drill bits functions good for drilling. Drill bits can also be used to bore holes on wood, metal, plastic, brick and wall, etc. Easily remove damaged or broken screws, bolts, studs, threaded pipe fittings and so on. Specification: Condition: 100% Brand New Material: Secondary Construction, HSS drill bits Type of Thread: Reverse spiral, tapered, coarse thread Color: As Picture Shown Screw Extractor: 3-6, 6-8, 8-11, 11-14, 14-18 and 18-25 Drills: 3/32, 1/8, 3/16, 1/4, 5/16, 3/8inch Package list: 6 * Screw Extractors 6 * Drills Bits 1 * Plastic Case