Mandril key holder

Tired of looking for the mandril key, which seems to have a mind on its own, I came up with this holder, to screw nearby the driller (m4 screws). I've printed it with 0,2mm resolution, 20% 6mm spaced infill, 1,6mm shell bottom (the screw hole face), 1,2 shell others. Took some 100g of filament and some 11h to be ready, since I went slow. You can put a different collor at z = 77,00, and go back to the original collor at z = 78,40 to have this nice contrast written "CHAVE DE MANDRIL". (In portugue