White Industries ENO Square Taper Mountain CranksThese ENO bicycle Crank Arms are an integral part of the White Industries drive train systems. They are machined out of billet aluminum, and use a rigid box shaped crank design, creating a crank that is extremely stiff and yet light weight. This box design allows power to be transferred directly into the bike crank arms rather than dissipated and lost as with a more flexible, less rigid crank design. White Industries also feature the spline interface