Check the listing for details. 20 pack .2mm .3mm .4mm .5mm Micro Drill Bit Kit Modeling Watch Repair more.... Condition: New. Listed at 19.95 USD. Quality Tiny Drill Bits For Toy Making Model Cars Trains Trucks Boats Miniature Modeling Jewelry making CNC Circuit board production Hobbies Woodworking Soft Metals Arts and Crafts Installation more... For CNC, PCB, Miniatures, Modeling, Jewelry, Precision Carvings, Plastics,Watch Repair .. .2mm .3mm .4mm .5mm Bit Information These bits are the same brand used by the Samsung Company in South Korea in their high-speed production lines. They are also being used by people all over the world for hand drilling uses mentioned above and countless dremel uses as well. Whether looking to drill holes at high speeds to make jewelry OR hand drilling plastics or small-scale minatures with a Pin Vise, these are the drill bits you can count on! These uses and more... Hand cleaning the nozzle head to your 3D printer Small scale miniatures Dollhouse Miniatures Modeling: Cars, Trucks, Trains ..... Wire for jewelry Sandings Carvings Drilling Instertion Holes Piercing Saws or Fret Saws Jewelry Making Woodworking Plastics Sizes 5 each .20mm .30mm .40mm .50mm