The 5/16" CHK reamer is crafted from high-speed steel (HS) for superior strength and longevity. This precision tool is designed to create smooth, accurate holes in a variety of materials, including metal and wood. With its straight flute design, it efficiently removes chips, ensuring a clean finish. Measuring 5/16" in diameter, this reamer is compatible with standard drill sizes, making it a versatile addition to any toolkit. Ideal for both professional machinists and DIY enthusiasts, it delivers reliable performance for all reaming tasks.