This item is a box of broken bolt extractor set made by high-speed steel, with good process details and durable texture, which can serve you for a long time without being easily . The design is reasonable, professional and practical, aiming to provide you with a better experience. Features -Color: Assorted. -Material: High-speed steel. -Size: About 19.50X2.50X1.50cm/7.66X0.98X0.59in. - Preferred high-speed steel material, , safe, durable and usable, long serving life. - workmanship, durable, can serve you for a long time without causing too much burden. - Drill bits' diameters and recommended extract diameters of broken screws are on the case. - Aggressive extractors and drill bits spiral flute design for extra gripping power. - Excellent to remove , rusted or stripped screws, studs, bolts, fasteners, metal water tap and water tube, etc. Package list: 11 x Broken Bolt Extractor Sets