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"Must Have Tool for Any Skill Level"
The Mascot Model Railroader Scale Rule provides quick reference for measurements in N, HO, S, and O scales, with a 12 inch, made in the USA, stainless steel ruler.
In addition to the scale measurements are a 100mm ruler and a 5 inch ruler showing 1/64 inch markings.
Also included are a quick reference chart for converting drill bits to decimals, i.e. bit #80 is 0.0135 inches, a reference chart for tapping and screw sizes, and multiple formulas for common scale measurements.
The ruler is thin and lightweight yet sturdy and could be used as a straight edge for scoring in a pinch.
Incredibly useful tool for scratch building - so much easier than constantly multiplying and dividing by 87!!!
"Model RR scale rule 12"
The Model RR scale rule is easy to read. I need the rule to convert real world feet to HO scale it does that very accurately. The addition of a table of decimal equivalents for number drills is helpful in determining size to use for building structures.