The numbers are not exact. I checked again with a very accurate digital caliper and this tool is 0.005 different in all dimensions except 1 inch which is 0.003 different in my tool (see pictures). However, at just $2, this is a great budget one. cork breaking tool. As long as you know the offsets, you don't need an expensive tool. It does the job. And indeed, the tolerances on the motors are not exactly measured. This is a range but check your manual it will tell you how much it could be. For my application it could be anywhere from 0.040 to 0.048, you might want somewhere in between, don't open and close the connector gap too often, depending on the connector this will break the connector. Happened to me enjoy your experience. However, for the dollar you get a tool for easy open/close spark plugs. Use vernier calipers to determine your dimensions when building track engines.
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