Its a 2 handed operation. take the shank off your machine that normally holds your regular feet. Then in your right hand pick up the walking foot putting the little bar that goes up and down on your thumb. Your thumb will hold it up in place when you go to mount it on the machine. Then using your other fingers lift the mechanism up that raises your foot, slide the walking foot on making sure the bar that is on your thumb is up on top of the screw and then tighten the foot into place. Let go of the thing that raises the foot and you should be in business. I hope that makes sense. Make sure you tighten it in place as several times during your sewing...walking feet tend to like to walk away....