About Labwork: Labwork is an Auto Parts One-Stop Solution brand of more than 10 years, which specializes in providing global customers with top-notched quality automotive parts & accessories . If you need any auto parts, its enough to come to Labwork. Features: The insert shape is designed according to the shape of the duck head, easy to use This head Fits for Coats machines with a tapered hole on the end of the plunger shaft that the head attaches to. It prevents wheels from scratching and damaging when clamping wheels from inside clamps Fitment: .