Mini tap handle ISO M3

I prefer this kind of small and lightweight tap handle when cutting fine threads in small plastic parts. Much easier to tap correctly without loading the part with the weight of a traditional metal handle. 

I forgot to turn on the brim when printing which made the tips of the handle lift off the print surface and bend slightly. This has been corected in the attached file.

Updated version with slightly improved locking tab, the old design was a bit weak