GNI is a custom design,engineering and manufacturing organization. We are not a distributor, do not stock and do not sell individual pieces. Parts are specifically designed for each customer's requirements and produced by GNI on a as needed basis. Our patented designs are entirely flexible. Examples shown on this site are meant to display the various unique features and capabilities that can be specified. GNI will tailor any of its proprietary designs or develop new ones to meet any torque limiting or tamper proof requirements.