No, they do not. Magnetic Transfer Parallels are a workholding accessory designed to be used on top of an existing magnetic chuck (either permanent or electromagnetic). Their function is to channel or "transfer" the magnetic flux. They are constructed with alternating magnetic (steel) and non-magnetic (brass or copper or stainless steel) strips that capture the magnetic field from the chuck surface and direct the lines of flux upward and outward. Why are they used? Lifting the Workpiece: They are used to lift the workpiece off the main chuck face. This is necessary when grinding a part completely through or on all sides, ensuring the wheel can pass below the part without hitting the chuck. Holding Complex Shapes: They help hold irregular parts or parts with a small footprint by bringing the concentrated magnetic field closer to the unique geometry of the piece.