This heavy-duty, simple-to-use, manual valve spring compressor makes short work of even monstrous springs. The compressor arm slides for adjustment, employing a locking pin for rapid, easy operation.Proform Made From Quality Steel and has a Blue Powdercoat Finish 66832Specifications: Feature/Benefit This heavy-duty, simple-to-use, manual valve spring compressor makes short work of even monstrous springs. Tool Type Valve Spring Compressors Category Spring Compressor Description_ABR Spring Tool Description_SHO Spring Compressor Description_INV Valve Spring Compressor Description_INV Heavy Duty Description_DEF Engine Valve Spring Compressor Description_ASC Engine Valve Spring Compressor Description_ASC Heavy Duty Model Description_ASC Manual Clamp Style Description_LAB Engine Valve Spring Compressor Description_LAB Heavy Duty Model Description_LAB Manual Clamp Style Description_DES Engine Valve Spring Compressor Description_DES Heavy Duty Model Description_DES Manual Clamp Style Description_EXT Engine Valve Spring Compressor Description_EXT Heavy Duty Model Description_EXT Manual Clamp Style Description_EXT Adjustable 12" Arm, and Can Withstand Up to 700lbs of Pressure Description_EXT Designed For Use While Head Is Off Engine Block Description_EXT Made From Quality Steel and has a Blue Powdercoat Finish Description_MKT This heavy-duty, simple-to-use, manual valve spring compressor makes short work of even monstrous springs. The compressor arm slides for adjustment, employing a locking pin for rapid, easy operation.