The Comb Drill & CtsK HS 4-1/2X5 from KEO, offered by Field Tool Supply, is a dual-purpose tool that excels in both drilling and countersinking. With a diameter of 4-1/2 inches and a length of 5 inches, this high-speed steel tool is engineered for efficiency in various materials. Its design allows for quick transitions between drilling and countersinking, saving time and increasing productivity. The durable high-speed steel construction ensures it withstands rigorous use, making it ideal for industrial applications and professional workshops.