Review on LEXIVON Measure AutoLock Fractions LX 204: The Ultimate Precision Measuring Tool for Accurate Fraction Calculations by Russ Conrad

I like double sided tape. If you need to install drywall on the ceiling, having the numbers on the back is very helpful. I also like that the fractions are written so I don't have to count the hyphens. You'll see right away if it's 3/4 or 7/8. I improved the locking function by making small grooves in the slider to make it less slippery. I found the original design a bit difficult to use with one hand as my thumb kept slipping when trying to unlock the slider.