●HASSLE FREE VALVE SERVICE: Orion Motor Techs valve keeper remover and installer tool kit helps you replace valve springs and valve keepers quickly and easily without removing the engine head ●WIDE COMPATIBILITY: This valve spring compressor set fits valve retainers 0.2" to 0.3" and 0.3" to 0.4" (4.5 to 7.5 and 7.9 to 9.5 mm) wide on a variety of gas and diesel overhead engines ●SECURE CONTROL: The valve keeper removal tools built in magnets hold parts securely during operation, maximizing efficiency and precision and reducing engine damage ●CONVENIENT GRINDING: Our valve retainer and spring remover set comes with 2 dual ended valve lapping tools to grind and polish valve heads and seats, facilitating engine maintenance and rebuilding ●SUPERIOR DURABILITY: Constructed from high quality aluminum alloy and carbon steel build with an oxide coating, these heavy duty valve adjustment tools ensure excellent strength and corrosion resistance for years of dependable service