Patent ID: 8549765

Claim:
A measuring tool for measuring a dimension difference value of a standard part and a test part, the measuring tool comprising: a tool body having a containing space for containing the standard part or the test part; and a first measuring unit disposed at the tool body corresponding to a first axis, the first measuring unit comprising: a first probe protruding inward relative to the containing space and movable elastically along the first axis, for contacting the standard part when the standard part is disposed inside the tool body and for contacting the test part when the test part is disposed inside the tool body; a first measuring meter connected to the first probe for displaying a first zero value or a first measure value corresponding to the test part; and a first zero button disposed on the first measuring meter for zeroing the first measuring meter to display the first zero value when the first probe contacts the standard part; wherein the first measuring meter displays the first measure value when the first probe contacts the test part after the first zero button zeros the first measuring meter, and a first dimension difference value of the test part and the standard part in the first axis is equal to a difference value of the first measure value and the first zero value.