DENAR® D31AB Facebow/Earbow features: Dual purpose D31AB Facebow can be located to the arbitrary or precise hinge axis or to the external auditory meatus. Independent sidearms for accurate alignment so its assembled dimensions are determined by the size of the face. Earbow mounts behind the condyle and the facebow mounts by means of mounting studs in the condyle. Comes complete with: Standard side arms, corssbar, dentulous bitefork, reference plane locator, instruction manual.