Busch Fig. 156C Hart 90 Degree Burs .70mm-3.70mm Bur Size:1.80mm The same stick included in

The same stick included in the complete True Size Ring Sizing System

10mm Notes

Extra-large 300mm diameter bowl for high-capacity production runs

The size designation refers to the diameter of the smallest curve in the stake

60mm – 3

Busch Fig. 156C Hart 90 Degree Burs .70mm-3.70mm Bur Size:1.80mm The same stick included inThese 90 degree hart burs are precision steel burs for cutting, opening, and refining angular seats and details in jewelry work. At the bench, they feel crisp and controlled where a clean edge matters. Manufactured by Busch to ultra high precision tolerances, Fig. 156C hart burs are a reliable choice for stone setting, seat preparation, and fine detail work across a broad range of sizes. Features 90 degree hart bur profile for precise angular cutting