4 Precision Gauges: Upgrade vacuum carburetor set features 4 precision gauges with brass lockable valves. Each gauge has its own individual damping control and calibration control. Gauges are mounted to a heavy metal base intended for bench top use. The colored coded scales on the gauge is designed for easy reading. Durable Frame & Multi-Function: This vacuum carburetor tool features sturdy construction with all hardware is high-grade chrome finish, and it can quickly diagnose improper timing, stuck valves, leaking manifolds, improper fuel mixture, spark misfires, and much more. What's more, the vacuum carburetor can synchronize the values of up to 2-4 carburetors. Complete Accessories: The set comes with 4 types of adapters for most motorcycle models, and a 4 PCS 30' rubber hose facilitate remote use. The product also provides you with a convenient carrying case equipped with a handle and lock for easy transportation and storage. In short, these combinations can help you troubleshoot