When I received these drill bits I thought they looked very nice. Nice titanium coating and a handy index for organizing. But when I... first time using them i found a fly in the ointment they are all crooked and stick out 1/2 to 3x the drill bit diameter i was able to straighten them to an acceptable level and they now press on the center mark .they are for hobby use suitable and therefore reasonably priced but not for serious drilling where true size is required, as they are not straight the holes will always be a bit oversized.