In addition to the Williams brand from which it originated, the group includes Bahco and CDI Torque Products.

[1] In 1882, James Harvey Williams and Matthew Diamond founded Williams & Diamond in Flushing, Queens, a drop forging business.

The company was one of the first to offer mass-produced drop-forged hand tools.

[3] A second factory was opened in Buffalo, New York in 1914, now the site of General Motors' Tonawanda Engine plant.

[citation needed] In 2011 it was officially renamed Snap-on Industrial Brands.