This standard deals with modified offset double end box wrenches with unequal openings; it includes the dimensions and the designation of these wrenches. The unified offset double ended box wrenches have to couply with the test torques series A according to DIN 899.
DIN 897:1987 history
2007DIN 897:2007-11 Box wrenches, double-head, modified offset - Dimensions and test torques series A
2007DIN 897:2007 Box wrenches, double-head, modified offset - Dimensions and test torques series A
1987DIN 897:1987 Box wrenches, double end, modified offset, with unequal openings; test torques series A