Koken are a well respected Japanese tool maker specialising in sockets.
They have a big range of imperial and metric sockets from quarter to a massive three and a half inch square drive.They developed the 148 degree 12 point configuration later refined to include a rounded profile to bear on the flats of a nut or bolt and not the corners.The Koken range are of very high quality sockets and we sell them in whitworth /BSF,AF, BA and metric in deep,normal and impact form.Koken do not make tools for other people all their tools are sold under the 'Koken' brand name.
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