1.25 Inch Mini Drill Bit 1mm Micro Chunk - Forged Steel (Pack of: 2) - TJ01-03312-Z02At just 1 1 4 inches long and 1mm to chuck, this forged steel micro chuck will fit just about any vise. Just the perfect size to keep in your toolbox. This drill chuck arbor is heavy duty, and made to do the job right every time you use it. You can attach it and insert into any drill with confidence, knowing you are using a quality product that will not let you down.* Only 1. 25 inches long its small enough to fit most projects * 1MM chuck size is