5 Drill Bit Adapter Chucks Jewelers Tools 4 Drill Bit Micro Chucks This is a new set of 4 drill bit micro chucks Great for drill bits, burs, polishing bits, etc All include 1 collet Each has a 1/8" shank Drill Bit Adapter Chuck This is a new drill bit adapter chuck Great for drill bits, burs, polishing bits, etc Includes 2 collets It has a 3/32" shank Newer versions of the item shown may be shipped, as a result, there may be a slight variation in color and design.