Experience the reliability of the Thexton Permanent Cold-Chek Anti-Freeze Coolant Tester Pocket, a must-have tool for any mechanic. Designed and manufactured in the United States, this vintage piece showcases the craftsmanship of a bygone era. Its durable construction ensures it stands up to the rigorous demands of professional use. Effortlessly determine the correct Anti-Freeze Coolant levels with this Thexton tester pocket. Compact and portable, it fits conveniently in your pocket or toolkit, allowing you to perform quick checks on the go. A timeless addition to your collection, this tool combines functionality with the classic appeal of vintage Thexton instruments.