the accuracy in even the most expensive brands is near 2% inaccurate

a super tool item will do a very good job for many years, they've gone up tho, they're now $50 and come with a case

lol @ testing it... There is very good Quality Control involved in tools bought from stores in oz that aren't ebay...

but if you wanted the near best, snap on tools and drop several hundred dollars (accuracy of 1% & 2%+/-)