Lisle 75500 Combustion Leak Detector Ear Plugs The hex shank on the

The hex shank on the drill bits helps prevent slipping in the drill chuck

Castor size: 2-1/2"

1/2" drive 1-3/16" SAE Vanadium 6 Pt

Size conveniently stamped on both ends of the beam for quick identification

Lisle 75500 Combustion Leak Detector Ear Plugs The hex shank on theQuickly Pinpoints Combustion Leaks. Checks for combustion leaks caused by bad head gaskets, cracked blocks, and cracked or warped heads. Fluid changes from blue to yellow when exposed to combustion gases from the radiator. Connect the hose to any vehicle vacuum line. Or, on tools made after June 2002, use the adapter with no cross hole with a hand vacuum pump. Place tapered end of tool into radiator opening. With the engine running, the vehicle vacuum