BETOOLL HW0130 8pcs Petrol Engine Cylinder Compression Tester Kit Automotive Tool Gauge Checking Compression On Petrol Engine Quickly And Accurately Easy Pressure Release Button On Side Of Tester Completed Kit Comes With Adapters For Most Applications Kits Includes 2 Rubber Cones Ends Which Do Not Need To Thread Into Head 3" Gauge Features Dual Color Scale