re: Slow learner

I use both Veritas and the Igaging blocks in Metric and Imperial.  They are accurate and fit my needs. Each has a 1-2-3 block in the corresponding measure.  I also have 2 additional Imperial 1-2-3 blocks that are not part of any set but that I use frequently for machine set ups and maintenance.  As the name implies, 1-2-3 blocks offer a 1", 2" and 3" accurate measurement.  
 
Here is the url on the Igaging sets:  http://igaging.com/right-on-set-up-blocks.html