Here's what other sites are saying:
Classic pitons for thinner cracks, Black Diamond Knifeblade's have precision-ground blades for a consistent taper and a hole in the thickest part of the head to reduce weight without sacrificing strength or durability.
- Mountain Gear
Black Diamond Knifeblades Knifeblades are stamped, bent and precision ground for use in thinner cracks. They are suited for tiny cracks and are amazingly resilient for their weight and size. Note that this item of climbing safety equipment is non-returnable. Please call us toll free at 877-236-8428 or e-mail firstname.lastname@example.org with any questions.
Bugaboos and Knifeblades are great tools for thin cracks. Knifeblades are stamped, bent and precision ground for the sole purpose of fitting into thin cracks. Bugaboos are just slightly thicker, beefier versions of blades for more abuse in thicker cracks.
The classic piton. Precision ground for fitting nicely into thin cracks.. . . Precision ground blade for a consistent taper. Hole in the thickest part of the head reduces weight without sacrificing strength or durability. Recommend using the offset eyes for clipping. Length: 3 1/2 in. (89 mm). Weight: 0.8 oz. (22 g). Thickness: 1/8 in. (3.2 mm).