• Highly accurate.• High-quality hardened steel.• Quick bit exchange.• Completely reliable.• Perfect centering.• Smooth rotation.• Replace older drill typesThese adaptors offer a modern way of replacing a dowel drill in your drilling and boring machines. Secure transition between the machine and a dowel drill. The bearing surface, thread and diameter are all important to be aware of when selecting a dowel drill adaptor.Centering cone 20° 48'. Use with: Balestrini, Bilek models.