This is a Cosasco Microcor Probe M3705-F10 Retractable Flush Electical Resistance Probe. It is a high-quality product that is perfect for professionals in the business and industrial sectors. The probe is specifically designed for use in test, measurement, and inspection, and is ideal for conducting electrical resistance tests on a variety of materials. With its advanced technology and durable construction, this Cosasco probe is a top choice for anyone looking for a reliable and effective testing tool.