Summary This is simple file handle suitable for small needle files with 3.5mm handles. The handle is 50mm long and 11mm diameter. I made this because most of the ones on Thingiverse were too big for my liking. If the hole is too small when printed, just use a cordless drill running in reverse with a 3-3.5mm drill as required. Don't run the drill forwards as this will cause it to 'grab' and you'll probably end up with a misaligned hole or injury. Print this on a raft or brim with 3 perimeters and 25-35% infill