RUKO Reamers & Countersinks Countersink 616420 - RUKO 102116, The Ruko 102116 Countersink is a high-speed steel machining tool with a 12.4 mm bit and a cylindrical shank. It is ideal for creating conical holes, ensuring smooth finishing in materials like metal and wood. This durable countersink bit is perfect for professional and DIY applications in various machining tasks. RUKO 102116 Countersink 12.4mm HSS Sharp CBN Ground Burr-Free
