 Hello, so today you received this box with your new handpiece of the Vision Pro 1000. So, we will do the replacement together, so the new handpiece is for you and we want to have the old handpiece, the previous handpiece back. First of all, you take your previous handpiece, you remove your bit of course, so you turn the cap, you remove the bit, you remove the outer cap, you remove the handpiece, you put this back in your handpiece spot, and here in the box you have first a protection layer, keep it like this, because you will need it after, and here is the new handpiece, make it open together, this one is your new handpiece, you put the new handpiece on your micro motor, so you let it slide, then you turn until it goes down very easily like this, when you have this, you click it, then you will place the cap again, turn, it slides easily, so you push until the click, so it's closed, so now you will have to remove the dummy pin, we make the handpiece open, remove the dummy pin, and you can put your bit inside, and you close the handpiece, so your handpiece, your bit is secure. The previous handpiece, you will take the protection paper, you put it here, and you turn until the other side, you close it, you make this, you take the box, you put it here, inside, in the middle, then you take the protection layer, put it in the box, and then you close the box, and you can send it back to us, so thank you and see you soon!