Made in Japan
Manufacturer: Tohnichi

DH square drive heads are standard interchangeable heads, and are useful when tightening many different types of bolts having the same shape, using the same torque wrench. It is best to possess one set. Use them with sockets for tightening. Reasonably priced.

Note: Models with a square drive of 25.4 mm and greater should be used with a through-hole socket.