Features: Remove broken or damaged screws, bolts and fasteners without any effort. Suitable to delete all available terms such as bolts, screws and studs varying in diameter from 4mm to 4mm. 25 mm. Delivered; in a storage box with 12 pieces: 6 pieces for the screw extractors and 6 other pieces for the drills. Very practical and practical to set up all these tools and carry them everywhere. This broken screw extractor kit is manufactured made of high quality material, durable enough for use. long term. These pullers will remove most types of damaged, bare, rusted, broken or stuck screws. Whether you are a professional or an amateur, you can all keep such a set of tools & agrave; the house in case of necessary situation. Specification: Material: steel Color: shown as pictures Drill bit sizes: 3/32 “, 1/8”, 3/16 “, 1/4 “, 5/16”, 3/8 “Screw Extractors (6 pcs): # 1 (Dia: 4.0mm / 0.15”) for 4-6mm / 0.15-0.23 “# 2 (Dia: 4 , 5mm / 0.17 “) for 6-8mm / 0.23-0.31” # 3 (diameter: 6.5mm / 0.25 “)