... Drill1) Suitable for Mould steel ,Cats Iron,Titanium alloy Copper ,and A;uminum processing, Mainly for the processing of center location hole ... Drill1) Suitable for Mould steel,Cast Iron, Titanium alloy,Copper,and Aluminum processing .Mainly for the processing of through hole , ... threaded hole,and location hole of the workpieces.2) No note for tolerence ...