Ruko manufactures high performance cutting tools - typically countersinks; step, twist,
tube and sheet drills; special drills, plus an extensive programme of deburring products – at its state-of-the-art production
plant in Germany. As one of Europe's market leaders, the company is dedicated to maintaining the most rigorous quality
CBN Countersinks (cubic crystalline boron nitride) much
harder than cheaper countersinks made from silicum carbide or corundum.