Product Features :

• Length: 12-1/2"
• Caution: Vehicle must be Placed in Park/Neutral before Applying Air Pressure, otherwise Vehicle may move. Keep hands clear of Fan, Belts and Pulleys since slight Crankshaft Rotation will Occur
• Compressor is Used by Removing Rocker and Fastening Tool to Stud with Nut
• Pull on the Handle to Compress Spring
• Use with 901DD or 2992D Air Hold Fittings to Keep Valve Closed
• Remove and Replace Valve Springs in GM 8-cylinder Engines
• Heavy-duty Tool Replaces Weak or Broken Valve Springs and Guide Seals with Cylinder Head on the Engine