New grade T-1 high-speed steel with 18% tungsten content. For comparison, this steel is much harder than m-2 HSS which typically has 12% tungsten. Crafted on state-of-the-art equipment, Each knife is ground, honed and individually hand-hammered to exacting tolerances. Many standard sizes available individually or in sets. Packaging: Bulk in Flat tubes.#P 130, (a°) angle: 45°, overall length (L): 4-3/8, thickness: 1/8, width: 5/8, knives per set: 3, p 130 3-piece HSS, T-1 18 percent tungsten 4-3/8 long x 5/8 height x 1/8 wide x 45 Deg cut angle