Adjustable socket wrench, universally socket wrench can easily withstands high torques, firmly and correctly grasp all nut and bolts in its adjustable size ranges of 10-19mm Application, immediate to hold most nut, screws, hook, square head screws, bolt heads, and more Easy to use, easy to handle large torques, firmly grasp, single hand operating Suitable for any standard 3 / 8inch drive wrench Wide ranges of adjustability: replace 3 / 8 " to 3 / 4 " and 10 to 19 mm sleeves, Manufacturer: JUYAXIN