Moroso Performance 62372 Stud Mount Valve Spring Compressor Conversion Kit Features: Valve Spring Changing Is Greatly Simplified Fits Both 3/8 And 7/16 Rocker Studs Strong/Durable Handle Withstands Extreme High Pressure Valve Springs 11 in. Handle Gives Leveraged Need To Compress Strong Springs Height: 1.25 Width: 5.38 Length: 7.19 Weight: 0.8