its a measuring devise usually used to find the inside diameter, outside diameter or thickness of something. If you want to be all hillbilly about it measuring tape will work but won't be accurate at all
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2000 Tahoe Z71 5.7
1982 Z28 Pacecar 305
1999 S10
Last edited by bubba428; 01-03-2008 at 09:08 PM.
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