It grew quickly and was reorganized and reincorporated in 1947 as DeWalt Inc. American Machine & Foundry Co., Inc. bought the company in 1949, and sold it to Black & Decker in 1960.

In 2004, Black and Decker bought rival power tool manufacturer Porter-Cable and combined it with DeWalt in Jackson, Tennessee.

[3] In 2011, DeWalt launched a line of contractors' hand tools (including utility knives, pliers, adjustable wrenches, tape measures, saws, and hammers).

"[7] As of 2015[update], they have seven U.S. manufacturing facilities, in New Britain, CT, Hampstead, MD, Shelbyville, KY, Greenfield, IN, Cheraw, SC, Charlotte, NC, and Jackson, TN.

[15] Black & Decker was long associated with lighter weight consumer tools such as domestic appliances, and not the heavy duty equipment professional builders wanted.

These tools were merely rebadged models from the Black & Decker "Professional" and "Kodiak" lines with a new yellow housing and an expanded warranty and service policy.

However, in July 2009, DeWalt announced that they would not be renewing their sponsorship deal with Kenseth and Roush Fenway Racing due to the poor economic conditions in the construction industry.

When Kenseth retired after the season of 2017, DeWalt moved to his replacement in the #20 Erik Jones and parent company Stanley sponsors Joe Gibbs Racing teammate Daniel Suarez.