Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces Fluxes Fluxing with boric acid may

Fluxing with boric acid may be required depending on the condition of the scrap

and precision bench work more comfortable

true-color viewing across the entire field

including items set with soft or porous stones such as emeralds

Replaces slow

Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces Fluxes Fluxing with boric acid mayImportant Notice: This set will ship incomplete. Due to ongoing supply constraints, Spearhead has been unable to fulfill all sizes in this kit as ordered. Otto Frei will contact you with the exact burs in stock, the sizes unavailable, and an updated reduced kit price at the time of your order. We are not back ordering missing sizes, as restocking timelines are unknown and inventory returns randomly. For reference, as of 7 29 2026, 25 of the 33 sizes