Are Fisch the same as Colt ?
I, too, wish I could get a refund on my Colt bits !!!!
And don't go with brad point.
I agree with John T. . I bought 3 sets of Norseman machine drills: fractional, letter, and metric
Expensive ? .... Yeah, kinda .... about $300 for all 3, but I think it was worth it.
Oh, and do your drilling on the lathe with a good chuck on the headstock.
Mark the tailstock end of your pen blank with an accurate center point and put a dimple there with an awl.
Use, firstly, a dead center in your tailstock Jacobs chuck and line up your blank before you tighten the headstock chuck.
Then, secondly, put the desired bit in your Jacobs chuck and carefully and slowly start to drill. If you want, do the drilling in two stages, the first with an undersize drill bit.