& nbsp; Save Effort Bolt Remover removes broken or damaged screws, bolts and fasteners effortlessly, improving work efficiency Advantage The screw extractor is made of high quality materials, the overall heat treatment is strong and durable, practical and efficient, and durable enough, black oxidation treatment, durable & nbsp; Package Comes in storage box with 12 pieces: 6 pieces for screw extractors (4.0mm / 4.5mm / 6.5mm / 7.5mm / 11.0mm / 15 mm) and 6 other parts for drills (3/32 " 1/8 " 3/16 " 1/4 " 5/16 " 3/8 "). Very practical and convenient to set up all these tools and carry them everywhere. & nbsp; Application Suitable for removing all available terms such as bolts, screws and stud with diameter ranging from 4mm to 25mm. & nbsp; Necessity Whether you are a professional or a hobbyist, you can all keep such a set of tools at home when needed. Features: Remove broken or damaged screws, bolts and fasteners without any effort.Suitable for removing all available terms such as bolts, screws and studs with diameter ranging from 4mm to 25mm Comes in a storage box with 12 rooms: 6 pieces for screw extractors and 6 more pieces for drills. Very convenient and convenient to set up all these tools and carry them anywhere.Made of high quality material, durable enough for use Whether you are a professional or a hobbyist, you can all keep such a set of tools at home should the need arise. 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 pieces): & nbsp; 1 (Dia: 4.0mm / 0.15 ") for 4-6mm / 0.15-0.23 " & nbsp; 2 (Dia: 4.5mm / 0.17 ") for 6-8mm / 0.23-0.31 " & nbsp; 3 (diameter: 6.5mm / 0.25 ") for 8-11mm / 0.31-0.43 " & nbsp; 4 (diameter: 7.5mm / 0.29 ") for 11-14mm / 0.43-0.55 " & nbsp; 5 (diameter: 11.0 mm / 0.43 ") for 14-18 mm / 0.55-0.70 " & nbsp; 6 (diameter: 15.0mm / 0.59 ") for 18-25mm / 0.70-0.98 " Storage Box Size: Approx. 19x10x4.5cm / 7.48x3.93x1.77 " Weight: approx. 410g Packing list: Screw extractors 1 x 6Pcs 1 x 6 drills 1 x plastic storage box