About this item Slotted taper for chatter-free deburring and countersinking. Made from 90°HSS content. Through slot chip removal prevents chips from clogging in workpiece. Gives best results at low cutting speeds in steel, wood and plastic and light metals. Scope: Mechanical workpiece , Aviation, War industry, Electric valve, Cylinder, sphere hole, ect. Service: We always put customer satisfaction first. If you have any questions about our products, please contact us in time, we will give you a satisfactory answer within 24 hours. › See more product details