RUKO Reamers & Countersinks Countersink 616423 - RUKO 102880P, Ruko manufactures the ULTIMATECUT 4S 102880P countersink with a 19 mm HSS cylinder shank. This high-quality machining tool is designed for precision countersinking applications. Ideal for both professional and industrial use, it guarantees enhanced performance in various machining tasks. RUKO 102880P ULTIMATECUT Countersink 19mm HSS Cylinder Shank 4 Blades