Features:Removing broken or damaged screws, bolts and fasteners without any effort.Suitable to remove any available terms such as bolts, screw and stud whose diameter varies from 4mm to 25mm.Comes in a storage box with 12pcs: 6 pcs for screw extractors and another 6 pcs for drills. Very convenient and practical to put your all these tools in place and carry them to anywhere.Made of high quality material, durable enough for a long term use.Whether your are a professional or hobbyist, you all can keep such a set of tool at home in case of any necessary situations.Specification:Material: SteelColor: Shown as picturesDrill Bit Sizes: 3/32", 1/8", 3/16", 1/4", 5/16", 3/8"Screw Extractors(6Pcs):#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(Dia: 6.5mm/0.25") for 8-11mm/0.31-0.43"#4(Dia: 7.5mm/0.29") for 11-14mm/0.43-0.55"#5(Dia: 11.0mm/0.43") for 14-18mm/0.55-0.70"#6(Dia: 15.0mm/0.59") for 18-25mm/0.70-0.98"Storage Box Size: Approx. 19x10x4.5cm/7.48x3.93x1.77"Weight: Approx. 410gPacking List:1 x 6Pcs Screw Extractors1 x 6Pcs Drills1 x Plastic Storage Box