8 Drill Bit Adapter Chucks Mandrels For Dremel Tools 3 Drill Bit Micro Chucks. This is a new set of 3 drill bit micro chucks. Great for drill bits, burs, polishing bits, etc. Each includes 1 collet. All have a 1/8" shank 2 Drill Bit Adapter Chucks. This is a new set of drill bit adapter chucks. Great for drill bits, burs, polishing bits, etc. Each includes 2 collets. Both have a 3/32" shank 3 Mandrels. This is a new set of 3 mandrels. Can be used with flex shafts, Dremel tools and drill presses. Felt cylinders, rubberized abrasives and grinding wheels can all be used with these mandrels. Each measures approximately 1 3/4" (44.5 mm) long with a 3/32" (2.5 mm) shank. We work hard to update our descriptions and pictures of our merchandise. As part of a process of ongoing innovation by our suppliers, newer versions of the item shown may be shipped before we are able to complete an update. As a result there may be a slight variation in color and design.