Prior to this, the unit was widely used in much of the world and it is still in use for some purposes, for example, it is used for tension of bicycle spokes, for informal references to pressure in kilograms per square centimetre (1 kp/cm2) which is the technical atmosphere (at) and very close to 1 bar and the standard atmosphere (atm), for the draw weight of bows in archery, and to define the "metric horsepower" (PS) as 75 metre-kiloponds per second. In addition, the kilogram force was the standard unit used for Vickers hardness testing.