The 11pcs screw extractor set includes a tap holder, 5 drill bits and 5 extractors, remove damaged screws or bolts without damaging the hole threads. Features: Made from Chrome vanadium steel, High hardness, rustproof, solid and durable. Drill bits' diameters and remended extract diameters of broken screws are etched on case. Left handed(extractors) and righted handed(drill bits) spiral flute design for extra gripping power. Designed to remove damaged, rusted or stripped screws, studs, bolts, fastener, metal water tap and water tube, etc. Applicable for home, car repair, mechanical repair. HSS drill bit size: 2.0/3.0/4.0/6.5/7.5mm. Specifications: Material: Chrome vanadium steel Package Weight: 650g / 22.93ounces Package Size: 200 * 140 * 40mm / 7.87 * 5.51 * 1.57in Packing List: 1 * Tap Holder 5 * Drill Bits 5 * Extractors 1 * Storage Box