Set of five 1/4' countersink drill bits with precision-ground 82-degree tips for drilling into wood, soft metals, rubber, plastic, and more Made of high quality M2 material construction for extended bit life and 1/4' shank fits common handheld power drill Five-flute design reduces vibration for smoother drilling and tri-flat shank allows easy gripping Set contains 1/4', 3/8', 1/2', 5/8', and 3/4' countersink drill bits that are very commonly used Sturdy aluminum case with handle included for carrying and storage