Most time I do calcs when making the drawings.?
I also have chart on wall which works for most. Then calculator in the tool box and 25.4 to covert from monkey ?? marks to inch
Dave?
I purchased my first metric tap in 1976 M12 used 12,000 still have tap.
My next purchase was this year M10 x 1.0 MM LH used it one time?
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mike allen
12:13pm? ?
only thing I can think of is that the dials are usually larger than the digital read heads & if ya want to do metric there's some math involved