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: This plastic head fits for Coats Models 5030 5040 5050 5060 5065 6050 6060 6065 7050 7055 7060 7065 7660 7665 all base line models may fit others as well. Package Includes: 5x Nylon Mount Demount Heads .