Flat Drive
Flat Drive is designed to guarantee a flat surface contact between the socket and the bolt/nut. The flat contact reduces wear and allows to transmit a higher torque value.
The Flat Drive system is also used for the square drive end as well as the hexagonal or bi-hexagonal openings of the socket.
Item
Input Square Drive Size
Output Size (METRIC)
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Z-SERIES
The Ko-ken Z-Series Collection
Koken Z-Series is designed for lower profile applications in difficult to get to locations. As an expert maker, we have been manufacturing socket wrenches for half century, and give our know-how and enthusiasm on them. Here we provide Z-series as next generation mechanic standard of socket wrenches.
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