Otto Frei–BORE Jewelers Drill Bit Basic Kit with 150 HSS Twist Drills Sizes #51–#80 Jura by GRS The bent shank configuration allows

The bent shank configuration allows access to areas that straight stamps cannot easily reach

Super Small Tip #2 (not included) only works with Hydrogen/Oxygen or Acetylene/Oxygen

10x Achromatic Lens System: The achromatic lens eliminates color aberration by combining multiple coated lenses cemented together using different types of glass

brings together four carefully selected Busch bur assortments to cover essential drilling

Otto Frei–BORE Jewelers Drill Bit Basic Kit with 150 HSS Twist Drills Sizes #51–#80 Jura by GRS The bent shank configuration allowsThe Otto FreiBORE Jewelers Drill Bit Basic Kit combines the precision of HSS twist drills with the smart organization of the BORE drill holder by Nashef Designs. This complete master kit includes 150 HSS twist drills in sizes #51 through #80, neatly arranged in a 3D printed organizer with labeled compartments and a clear viewing window. Compact and thoughtfully engineered, it keeps your most frequently used micro drill sizes visible, protected, and