If you want to keep your lens adjustment tool for the raspberry pi close-by, this little holder can do it for you! It can be screwed down using a countersunk screw and should provide a snug fit. 
I recommend printing at 0.10mm to ensure a proper fit. As this is supposed to be snug but not too snug this print can be very sensitive to heat-shrinking. If it does not fit the first try: Try rescaling a bit - It should not hurt the ability to take the countersunk screw.