Probe Master's first priority is to please our customers. If for any reason our products do not meet your quality expectations, we invite you to exchange the product or return it for a refund. Our plant, located in El Cajon, California, also manufactures OEM special products for the electronics, automotive and telecom markets. We welcome your inquiries. Our key personnel are Dick Press- President, Julie Davis- Vice President and Cindy Tipps- Operations Mgr.