Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces Thomas Mann and German-made lenses that provide

and German-made lenses that provide crisp detail and high contrast for extended use

Part number suffix indicates thickness

Use refractive index liquid between the stone and prism to ensure proper optical contact

The bowl is filled with black pitch that softens when heated

71 mm Pack Length 60" (5 ft

Spearhead High Speed Steel 90 Degree Bearing Bur Master Kit of 33 Pieces Thomas Mann and German-made lenses that provideImportant 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