They are sold by Clarke International UK. I cannot find any information ref. where they are built.
Clarke are now made in China.
Strategy manufactures Strategy power tools. Strategy power tools were sold by QVC.
Clarke tools are a brand name that are used for multiple purposes. Clarke offers a variety of power tools, screwdrivers, wrenches and such other small tools. It's main competitor is Dewalt tools.
home depot
Bosch manufactures the more expensive ones in Germany or Switzerland and has the cheaper ones made in China.
Positec. http://www.positecgroup.com/our_brands
Porter Cable is an American based company that manufactures power tools. The company has introduced new power tools into the industry.
Hilti Tools were originally only made in Leichtenstein, now, they are also made in Austria, Germany, USA and China.
Harbor Freight Tools
China manufactures Masterforce.
I think it is Sears.
Armstrong Tools manufactures industrial hand tools like hand sockets, power sockets, chisels, hammers, screwdrivers, nut drivers, pliers and c-clamps. It started off with a tool holder for lathe cutting tools before diversifying.