Antonini Old Bear Walnut Mushroom Knife Medium "Old Bear" Mushroom knife by Antonini of Italy, Walnut-wood handle and brass collar with stainless steel mushroom-picking blade and brush for removing dirt and debris. Available in sizes M only. Antonini Old Bear Walnut Mushroom Knife Medium Specifications & Features: BLADE Length: 68 mm. - 2.68 in. Height: 14 mm. - 0.55 in. Thickness: 2.0 mm. - 0.08 in. KNIFE Closed length:: 130 mm. - 5.12 in. Overall length: 198 mm. - 7.80 in. Size: M Unpackaged weight: 43 gr. - 1.52 oz. Weight: (including box) 58 gr. - 2.05 oz. TECHNICAL SPECIFICATION BLADE Material: Stainless steel, W 1.4060 Finish: Satined Logo: Electrolytic marking "Old Bear" on front side Heat treatment: Tempering with cryogenic treatment + hardening Hardness: 58 HRC +/-1 Type of shape: Hawk-bill Opening system: Two hands with nail nick Type of edge: Plain Sharpening: Artisanally handcrafted Deburring: Artisanally handcrafted HANDLE Material: Walnut wood w/4-clumpted reinforced horsehair brush (20mm lgth) Surface protection: Treated with technical vaseline oil SAFETY RING Material: OT58 brass Surface treatment: Pickling, de-leading and passivation Operating system: Slide-lock to lock the blade when opened and closed in harmonic wire c72 Fixing system: Adjustable Torx T8 pivot with saline nitrocarburation and post oxidation Accessory supplied: L-Type key with Torx T8 on both ends Made In Italy