Drill Doctor is a member of the Darex family of brands. Darex has been creating sharpening tools since 1973 under the brands DAREX industrial bit sharpeners, Drill Doctor professional and DIY drill bit sharpeners, and Work Sharp knife and tool sharpeners.

Darex began in 1973 in Beecher, Illinois. The D, A and R of DAREX are the initials of three generations of the Bernard family. Grandfather Arthur Bernard, who earlier founded the Bernard Welding Company, contributed his energy and guidance to David and his father Richard.

In 1978, Darex relocated to Ashland, Oregon where it continues to reside. In 2012, Matthew Bernard became the fourth generation family owner of the company.