Diablo 4-In. Cobalt Pilot Drill Bit is expertly designed to cut through hardened metals, cast iron, and stainless steel with ease. This drill bit exceptional durability and performance, making it an i choice for demanding drilling tasks. It is compatible with all Snap-Lock Plus mandrels, enabling quick and effortless bit changes to keep your work efficient and uninterrupted. Whether you are working on metal fabrication or heavy-duty projects, this cobalt pilot drill bit delivers reliable precision and long-lasting strength. Model Number: DHS4BITCB