【High Quality】HSS Titanium Nitride coated heavy duty step drill for better toughness, wear resistance and long lifetime, precision ground for accurate drilling for various materials such as sheet Aluminum, metal and iron (up to 0.2" thickness), copper, acrylic, PVC
【Designed for Performance】135° Split point drill tip for faster self-centering without walking, special multi cutting edges on drill tip cut long chips to remove chips smoothly, reduce heat while drilling, increase drilling speed and extend lifetime
【Efficient Design】Spiral groove, double flute design allows easy chips removal as well as deburring holes clean for faster and smoother drilling performance
【Integrated Hex Shank】One piece 1/4-inch quick change hex shank to easily and securely fit into standard drills, drill presses and impact drivers
【Popular Sizes】Includes 10 steps imperial drilling sizes: 1/4", 3/8", 1/2", 5/8, 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" inches. Laser marking of step size provide convenience and accurate drilling