The Vevor step drill bit is designed for drilling multiple hole sizes with a single bit, covering sizes from 3/16" to 1-3/8". Made from M35 cobalt high-speed steel with a TiAlN coating, it is built for durability and long-lasting sharpness. Its 118° tip and 4-flute spiral design help deliver smooth cutting, fast chip removal, and cleaner holes. The 3/8" tri-flat shank provides a secure fit in standard drills. It is suitable for stainless steel, sheet metal, wood, plastic, and fiberglass up to 1/8" thick.