Dremel Accessory 9901 Tungsten Carbide Cutter Bit with Square Tip - 3.2 mm Multifunctional Cutting Bit for Rotary Multi Tool : Amazon.co.uk: DIY & Tools
Dremel 9910 1/8 inch Spear Tip Tungsten Carbide Cutter for Steel, Iron, Ceramics, Plastics, and Hard Wood - Walmart.com