Made in China measuring tools were cheap but their accuracy was unreliable. I was measuring 60cm on a few pieces of planks today with a made in China tape for a. table yesterday. Today I continued with the same task. using a Stanley tape . After cutting them I found those I measured with Stanley measuring tape were almost 5mm longer than those measured with the China made tape.
I was wondering which measuring tape was inaccurate. To check this out I took a 60cm steel ruler and test it on the wood measured with the Stanley. The measurement matched perfectly. The planks measured with the China tape was nearly 5mm in error . As such I had to discard the shorter planks.
If this could happen with the measuring tape it could happen to my made in China set square.as well. I used an English made set square to draw a 90 degrees line on a 1 inch by 4 inches plank. Then I used the Chinese made square to check the line. Now i knew why I made so many errors when making square boxes whenever I used the Chinese tool to measure. The line was out of square by 3mm. And that was across a 4 inch wide plank. The error would be very big on broader planks.
I will not use any Chinese made measuring tools again except for drawing straight lines .