| 摘要 |
A torque wrench has a shank, an arm, a torque-adjusting device, a handle and an adjusting knob. The handle is mounted around one end of the shank and has a mouth. A window is defined in the periphery of the mouth. The adjusting knob is rotatably attached to the shank. A stepped protrusion formed on the adjusting knob is connected to the torque-adjusting device and is received in the mouth. A scale is formed on the outer periphery of the stepped protrusion and corresponds to the window. An index line is formed on the handle and corresponds to the scale. Accordingly, the scale can be easily read through the window with the index line. The mouth can provide a protecting effect to the scale to keep the scale from being worn off, such that the useful life of the torque wrench is prolonged.
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