KEE Gold – The Key to Knowing Gold We are KEE, the designer, patent holder, trademark owner, and manufacturer of this product. This is the latest/upgraded Replacement Pen Probe for use with the KEE GOLD TESTER Model M-509GM (sold separately). This item includes Technical Support directly from our staff Engineers. It boasts high accuracy and long life, and it’s It’s stylish body is constructed of heavy duty plastic.There should be no confusion as to the current model of this product as the old product is no longer sold. This is the OFFICIAL KEE Gold Tester Pen Probe. This product no longer includes the abrasive tip. With the purchase of this product you are getting the most current technology, directly from KEE, the manufacturer. You also get technical support directly from our staff engineers, as well as 30 day limited warranty. FREE USPS First Class Mail