Busch Fig 446AU Carbide 70 Hart Burs 3/32" Shank .90mm-2.30mm By the Piece Bur Size:1.00mm 35 mm) diameter shank

35 mm) diameter shank

The Eid/Longhi design addresses a common frustration in the studio: stakes that tip in the vise during hammering

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

Machined from 99% pure tungsten

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

Busch Fig 446AU Carbide 70 Hart Burs 3/32" Shank .90mm-2.30mm By the Piece Bur Size:1.00mm 35 mm) diameter shankSold 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.