Busch Fig 446AU Carbide 70 Hart Burs 3/32" Shank .90mm-2.30mm By the Piece Bur Size:1.00mm The replaceable solid tips can

The replaceable solid tips can be shaped to fine points by filing or grinding

Hardcover binding for durable

9% of odors and fumes

Sold in a 44 lb (20 kg) cardboard box — ideal for high-volume casting operations

and tanks are not included and must be sourced separately

Busch Fig 446AU Carbide 70 Hart Burs 3/32" Shank .90mm-2.30mm By the Piece Bur Size:1.00mm The replaceable solid tips canSold by the piece, Busch Fig 446AU carbide 70 hart burs are designed for cutting clean, accurate stone seats in prongs on precious and hard metals. The sharp carbide blades bite smoothly into the metal, providing a controlled, predictable feel at the handpiece. Features 70 hart profile engineered specifically for cutting prong seats for stone setting. Carbide construction for extremely long service life compared to steel or tungsten vanadium burs.