In 1932 Daniel M. Lang was an engineer at Snap-On Tools. He started producing thickness gauges and replacement hone stones in his basement in Racine Wisconsin. Snap-On Tools back then was a fairly new company and was among the first of his clients. The primary company now called A & E (Automotive Equipment) continues to supply professional automotive hand tools to Snap-On, Sears, Mac, and Matco with their respective branding on the packaging. For more information visit Kastar AKA A&E or call them at 800.645.1142.