This may be a precision-tooled magnetic bit designed for use combined with TAMIYA Ratcheting Screwdriver PRO in Item 74152. It's to be used on 2mm hex mind screws.
• (+) Screwdriver Bit L (brief) x1
• Bit size: 2x100mm
• Precision crafted Chromium-vanadium metal.
• suitable for Item 74152, and electric screwdrivers which could make usage of 6.35mm hex shank bits.