Size information:10 pieces damaged nut and bolt extractors, internal size is 9/10/11/12/13/14/15/16/17/19mm. Outer hex size is 16/16/19/19/19/22/22/25/25/27mm Superior Performance:Spiral cut teeth provide positive grip, eliminate circular or damaged bolts .Can be driven with wrench or metric socket. 【Convenient puller tool】Remove the nut, it’s ten sets of different sizes suitable for damaged and rusty nut bolts, they are considered unscrewing screws, nuts and the most important conductive stabilizing tool. 【Multifunctional】The twist socket set is suitable for eliminating rust and wear, as well as for cover the paint coating of nuts, bolts. screws. Specifications: Color: Black Standard: M-Etric Thread Type: Reverse Spiral Cut, Tapered Model: #1/2/3/4/5/6/7/8/9/10 Internal size (suitable for removing hex size): 9/10/11/12/13/14/15/16/17/19mm Outer Hex Size: 16/16/19/19/19/22/22/25/25/27 mm Packing List: 10 x Nut Extractor Note: This does not include other things, the color is based on