ATD Tools 3705 Coolant Refractometer

High-quality Refractometer offers a fast, easy way to test the freezing point of coolant/anti-freeze.Works with Ethylene or Propylene Glycol or long-life anti-freeze.Also measures battery acid gravity to determine battery life.Automatic temperature compensation.Large, easy-to-read graphics and high-contrast lens.Adjustable viewfinder; rugged, steel body construction. Includes storage case, fluid dropper, cleaning cloth and mini screwdriver.