Oval-shaped Elliptic shafts give the Black Diamond Spire Trekking Poles increased stability and durability to take on all the abuses dished out by long days on the trail. Black Diamond gave the Spire Trekking Poles anatomically correct, dual-density handles to make your hike as comfortable as possible. A combination of FlickLock and Binary locking mechanisms make length adjustment quick, easy, and solid to keep you going mile after mile.