From More Super Hard, you can get a PCD reamer with high accurate, reliable quality and economic to solve your problems in bores machining. Simple PCD reamers, customized multiblade stepped reamers and on to customer specific special tools are all available. Precision reamers are designed to slightly enlarge the size of a previously formed hole with a high degree of accuracy that leaves the sides smooth. Youll find the reamer tool you need for a variety of applications and materials here. A reamer is a tool that is used to widen the size of a pre-existing hole in metal by a small amount to leave smooth sides and edges removing any burrs or rough edges. Its a pointed round file with a tip thatâ??s typically coated in diamond dust to create a hard, durable surface thats great for filing. Reamer tools are ideal for those who are looking for a more precise hole, as they take the pre-drilled hole made by a drill bit and make it truly round and of an exact diameter size.