Tesoro was a manufacturer of metal detectors from the USA that was known for its high quality and durability. The company offered a wide range of products for hobby and professional treasure hunters, including detectors for coins, jewelry and relics. Tesoro was based in California and had been in business since the 1980s. Their products are popular with metal detector enthusiasts and are known for their reliable performance and user-friendly design. Tesoro ceased business operations in 2020. Their devices are now only available on the second-hand metal detector market