Features: 1. Multifunction – This Coolant System Refill Tool Kit is designed multifunctionality in mind, it come with cooling system leak tester and coolant vacuum refill tool, the tools provide Vacuum Leak Testing on the Cooling System, Refill cooling system and Removing Trapped Air. 2. Widely Fitment -- The kit includes 5 adapters(31mm, 35mm, 40mm, 42mm 45mm) and 1 tapered cone adapter, ensuring universal for a wide range of vehicle models, making it convenient and versatile for most brand making radiator openings and coolant reservoirs. .