[10] Also in the mid 1980s, the company started manufacturing adjustable wrenches in the US, which they had previously been purchasing from a Japanese supplier.

[11] Klein Tools built a drop forging plant in Moran, Kansas and distribution center in Cedar Rapids, Iowa before the 1990s.

[11] In December 2011, the company announced that it was closing its plants in Skokie and Roselle, and moving their operations to Texas.

In September 2018, Klein Tools acquired Saint Paul-based Ergodyne, a manufacturer of safety work gear.

[11] Drivers of Klein-backed cars included Jacques Villeneuve, who won the Indianapolis 500 and the CART championship in 1995; and Dan Wheldon (co-major sponsor with Jim Beam) as well as being an associate sponsor for all of Andretti-Green Racing, who won the Indianapolis 500 in 2005.