Threaded-Shank Drill Bits
Threaded-shank drill bits screw into a threaded adapter on a handheld drill to enable drilling in tight areas where standard drill bits that install into a chuck can't fit. They are commonly used for angle and offset drilling. The threaded connection also ensures the bits will not fall out of the drill. Threaded-shank drill bits have a self-centering 135° split point, also known as a crankshaft, that helps stop the bits from walking when starting to drill a hole.