a coping apparatus that performs a cope cut of varying diameters and angles on varying sizes , diameters , and types of materials without having to change the diameter of the cutting tool . the apparatus comprises a table with a clamp , a cylindrical housing with an aperture pivotally mounted to the table , a motor , a tool , and a yoke assembly . the yoke assembly is rotatably received within the housing and comprises a upper disc with a channel , a lower disc with a channel , a upper arm , a lower arm , a connector , and a handle . the arms are received in the channels of the upper and lower discs and moveable in a direction radial to the rotation of the discs . the motor is mounted to the lower arm and turns a spindle and the tool . upon manipulation of the handle , the tool is plunged into the material to make the cut .