Amazon.co.jp: Proxxon No. 26710 High-speed Bit Set of 5 Types, Disc Type 0.1 inch (3.1 mm), Rod, Triangle, Cannon, Round, 0.1 inch (2.3 mm), Shaft Diameter 0.1 inch (2.35 mm) : DIY, Tools & Garden
Amazon.co.jp: UID No. 820 Diamond Bit & Disc Whetstone (PROXXON), 0.09 inch (2.35 mm) Axis, 42 PCS Set, For Mini Routers, Routers, Routers, Routers, and Pen Routers, Standard Mandrel Size: 0.09 inch (