Precision Bit Adapter - 4mm bit to 1/4" (Regular drill bit Size)

I made this so that I could quickly open up small electronics with a handheld power screwdriver. closedbottom4mmaadapter4.stl is tight on the bit. closedbottom4mmadapter3.stl is a little loose on the bit. Both of these. ^^^^^ Were Printed using .4mm Nozzle. closedbottom4mmadapter6.stl ^^^ Print with this one if you have a .2mm Nozzle. This for me seems like an absolute perfect fit. Feel free to let me know how you make out.