One of Hammerhead's line of knives, including the Cranium, Ulna, Patella, and Ilium. These knives are named after the bone they are meant to be worn closest to. The Ulna, then, is designed to be worn in the arm, but can be worn anywhere on the body.
Hammerhead's proprietary processes create a very sharp, lightweight and durable knife. The blade is constructed from Stainless Steel, with a hardness of 55-56HRC. The knife is low-profile and designed to be worn close to the body, eliminating “line traps” and minimizing drag.
The “Ulna” is a minimalist blade, designed with the freediver in mind. Slim, strong and lightweight, the “Ulna” checks in at a mere 85 g (2.99 oz) and with a 7 cm (2.75″) blade length, is a serious tool.
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About Us
Welcome to AQUASMITH, your number one source for all things in spearfishing. We're dedicated to providing you the very best of dive gear and lessons, with a focus on dependability, customer service and uniqueness.
Founded in 1999 by Morito Asai, AQUASMITH has come a long way from its beginnings in Garapan, Saipan. When Morito first started out, his passion for providing the best equipment for his fellow fisherman drove them to start their own business. We now serve customers all over the US, and are thrilled to be a part of the fair trade wing of the spearfishing industry.
We hope you enjoy our products and services as much as we enjoy offering them to you. If you have any questions or comments, please don't hesitate to contact us.
Sincerely,
Morito Asai , A diver