Threaded shank drill bits can drill precise holes in confined spaces and hard-to-reach areas. The bits have threaded shanks that connect to drills and attachments, and they are often used in the aviation industry. These Threaded Shank Drill bits are manufactured to NAS 965 Type "D" specifications and are designed for drilling hard, high tensile strength materials.

These Spotting Drill Bits are stub length and are designed to be extremely rigid so that they can precisely spot a hole for a twist drill. The goal is use the spot drill to make a little dimple in the workpiece that keeps the twist drill from walking so that the hole winds up in the right place.