Abstract: Radio frequency cables have a inner circular conductor and an outer circular conductor. The inner and outer circular conductors are usually formed from copper and are separated by a heavy insulation layer usually cellular polyethylene. The outer side of the outer conductor may further be coated with a heavy polymeric insulation layer. In preparing these radio frequency cables for coupling it is necessary to have a flush cut surface. These flush cuts have been effected in the past by sawing, which has proved to be troublesome as metallic particles are dispersed throughout the insulation. The outer conductor may be prepared for coupling by: 1. Placing a tear collar over the outer conductor and 2. Tearing the outer conductor against the tear collar. This tearing creates an integral and desirable flange in the tearing process.