This LS valve spring compressor is compact, is activated with normal hand tools, and takes up almost no space in your toolbox. It will cut valve spring removal and replacement time to around 1-hour. And, it's guaranteed to get the job done as easy, if not easier, than expensive compression tools. Quick tip: Instead of stuffing rope through the spark plug hole to prevent your valve from falling, use Proform's Air Hold Adapter Set with and air compressor to do the job properly.Proform Engine Valve Spring Compressor 67605Specifications: Feature/Benefit This LS valve spring compressor is compact, is activated with normal hand tools, and takes up almost no space in your toolbox. Tool Type LS Tools Category Spring Compressor Finish Black Description_ABR Spring Tool Description_SHO Spring Compressor Description_INV Valve Spring Compressor Description_INV Direct Mount Description_DEF Engine Valve Spring Compressor Description_ASC Valve Spring Compressor Description_ASC On-Engine Direct Mount Model Description_ASC LS1 Description_LAB Valve Spring Compressor Description_LAB On-Engine Direct Mount Model Description_LAB LS1 Description_DES Valve Spring Compressor Description_DES On-Engine Direct Mount Model Description_DES LS1 Description_EXT Engine Valve Spring Compressor Description_EXT On-Engine Direct Mount Model Description_EXT Fits LS1, LS2 and LS6 GM Engines Description_EXT Black Finish Description_EXT Made from High-Quality Steel Material Description_EXT Sold Each Description_MKT This LS valve spring compressor is compact, is activated with normal hand tools, and takes up almost no space in your toolbox. It will cut valve spring removal and replacement time to around 1-hour. And, it's guaranteed to get the job done as easy, if not easier, than expensive compression tools. Quick tip: Instead of stuffing rope through the spark plug hole to prevent your valve from falling, use Proform's Air Hold Adapter Set with and air compressor to do the job properly.