U-shaped pitons for extra holding power
Most pitons rely on compression of the metal and leverage from directional pull for their holding power. The U shape of the shaft on the Corner piton adds an additional holding force by creating spring tension when the piton is driven into a crack proportionately smaller than its width.
#1: 55 g, 1.9 oz
#2: 64 g, 2.3 oz
#3: 94 g, 3.3 oz
#4: 117 g, 4.1 oz