The Lyndon HSS Taper Drill 6 - 20mm is designed for versatility in drilling large diameter holes and expanding pre-cut holes. Also known as a cone cut drill, it provides the ability to drill a range of hole sizes within its diameter range. Size Range : 6 - 20mm diameter Features : Cuts an infinitely variable size of hole within its diameter range Material : Solid high-speed steel (HSS) Applications : Ideal for drilling holes in thin sheet materials including steel, brass, aluminium, copper, plastic, and wood Design : Accurately ground taper and flutes Brand : V Coil