Quality Construction one-piece design for added strength superior locking mechanism exceeds industry tensile strength ratings low Insertion Force tapered thin tip reduces initial friction. Lowest insertion force with high tensile strength Reduces installation fatigue No Burrs or Sharp Edges Smooth corners provide added safety. Rounded edges eliminate insulation damage. Stepped Tail Gripper Tapered tail grip assures positive threading Stepped tail allows for easier grabbing and tightening once engaged. Angled Tail Provides quicker initial insertion and Lowers installation costs.