The 21/64 HD JOBBER DRILL HS from Field Tool Supply is a high-speed steel drill bit designed for heavy-duty applications. With a diameter of 21/64 inches, this jobber drill is perfect for drilling through various materials, including metal and wood. Its high-speed steel construction ensures durability and resistance to wear, making it suitable for both professional and DIY projects. This drill bit meets industry standards for performance and is compatible with standard drill chucks, providing versatility and reliability in your drilling tasks.