Spire Trek Pole - Pair by Black Diamond The Compact is a shorter, 125 centimeter version with a reduced grip size for smaller hands. Standard adjusts from 105cm to 140cm. in length Almost two times the fore and aft stiffness of any pole on the market. Elliptic shaft is non-rotating, offering immediate spring pin engagement with the Auto Lock Binary system Built with a 15 degree corrective angle that keeps the wrist in a neutral position Low-finger-pressure, high-locking-force Elliptic FlickLock allows simple mid-stride adjustments