Tensile machine can test different sample materials, fixture, the reason is that can be equipped with different tensile machine fixture by force in sample making tension tester can test samples of all kinds of force values such as stretching, stretching, compression, shear, tear, peel, such as mechanical properties, the fixture is one of the most important parts of tensile machine, Different materials need to choose different fixtures to ensure the accuracy of the test, if according to the different power sources can be divided into: manual fixture, pneumatic fixture and hydraulic fixture. The former is completely rely on artificial operation to clamp the style and the latter is the application of pneumatic principle and hydraulic principle will clamp the style, generally speaking, the price of manual fixture is not hydraulic fixture and pneumatic fixture high.