Classic pitons for thinner cracks, Knifeblades have precision-ground blades for a consistent taper and a hole in the thickest part of the head to reduce weight without sacrificing durability. Two clip-ins for corner placements and weight reduction Tech Specs Weight : 22 g (0.8 oz) Thickness : [No. 2, Thick] 3.2 mm (1/8 in)