Busch Fig 446AU Carbide 70 Degree Hart Burs on 3/32" Shanks-Set of 15 .90mm-2.30mm Redi-Prongs it delivers consistent forming performance

it delivers consistent forming performance and long-term durability for professional jewelers and metalsmiths

plain bands can be compressed using one of 12 countersunk and polished reducing holes

Platinum alloy is 950 platinum / ruthenium (95% platinum

Made in Germany to Bergeon's professional standards

Four-prong setting for secure round center stone retention

Busch Fig 446AU Carbide 70 Degree Hart Burs on 3/32" Shanks-Set of 15 .90mm-2.30mm Redi-Prongs it delivers consistent forming performanceThe Busch Fig 446AU Carbide 70 Degree Hart Burs are precision engineered tools designed specifically for cutting seats in prongs. This complete kit includes 15 burs in a plastic storage box, covering sizes from 0. 90mm through 2. 30mm in 0. 10mm increments giving jewelers and stone setters the full range needed for consistent, accurate prong seat work. Carbide burs are the longest lasting burs available, outlasting both tungsten vanadium and high