Grivel – Air Tech Evo G-Bone Posted on August 24, 2016 by itkwpadm Made from chromolly steel. Blade: Classical positive Shovel. Resistance: 280kg Shaft/grip: G-bone rubber Weight: 16.7 ounce Length: 48-53-58-66 Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)