Weller was established in Besigheim, Germany by Carl C. Weller in 1958, and incorporated into the Cooper family of industries in 1970.

Throughout its history Weller have introduced products at the forefront of soldering technology. Its innovations have included the Magnastat® controlled soldering pencil in 1976, and the temperature-controlled soldering station for highly sensitive components in 1983.

In 2010, as part of a joint venture between Cooper Industries and Danaher Corporation, the companies became Apex Tool Group. Apex Tool Group markets some of the leading brands in the tool industry worldwide, including Allen®, Apex®, Armstrong Tools®, Campbell®, Cleco®, Crescent®, Erem®, GearWrench®, H.K. Porter®, Jacobs® Chuck, Jobox®, K-D Tools®, Lufkin®, Nicholson®, Plumb®, Sata®, Weller® and Wiss®, among others and manufactures several industry leading private label brands for large retailers and industrial distributors.

Today Weller is a dominant and instantly recognisable presence in the world soldering market, with a team of highly qualified engineers and developers committed to the highest standards of product design and performance.