Assertion: cone wrench | /r/HasProperty | essential
Facets:
Source sentences:
text: There are times when two cone wrenches of the same size are essential -- for instance, Campagnolo Record rear hubs use a 14-millimeter wrench for both the cones and the locknuts; the locknuts have narrow flats and taper in such a way that you must use a cone wrench for the locknut as well as for the cone.