I've used these for several jobs in only a short time. They are small drill bits, but that is the point of a MICRO set. I have used these to create holes to insert wiring on 1/48 scale radial aircraft engines, to hand-build 50 cal machine gun ports that were inexplicably absent on a WWII fighter plane, and to repair an old P-51's broken landing gear strut by hollowing it out to insert a small metal shaft. They worked flawlessly, and I would not hesitate to recommend them for this kind of crafting.
This pin vise and drill set is of limited hooby use more of a cleanout device for small orfices. Carrying case is nothing more than a flat piece if vinyl with a pocket for the vise and size labeled pockets for the bits.
it allows for slow controlled drilling and makes a perfect hole each time. good selection of drills.
"Magnum - Micro Utility Drill Set"
excellent for when building small engines that you want to install spark plug wiring too.