1. Flexible location motor-driven pulley. It is easy to fix and achieve the change of speed. 2. The height of slope is relatively low so that is benefit of fix the specimen; strong impact resistance board, guarantee the fastness of the structure. 3. The pulley can be adjusted to horizontal in order to fix the specimen for customer. The angular adjustment can be driven by cylinder which is flexible and convenience. 4. In order to keep the test staff completely safe the tester support remote control operating. 5. The customer only need to fix the machine on the ground when stalling, no other complicated operation convenient for test.