The Ultimate Maker's Notebook.
The Inventor's Notebook is designed to be the best companion for all inventors, engineering students, and tradespeople. It includes 14 pages of useful information in the included reference data section. The information includes: Tap and Drill sizes, Bolt Specifications, Pipe Tapping Sizes, Pipe Thread Identi
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Awesome little fella
Formulas and conversion tables in the begining pf notebook
Very nice touch