Perfect size for my 1.8t AWP engine. Chucked it up into a power drill with a known RPM and honed my block myself. It was my first time and I've since put 20k my motor... Zero compression issues. Lubricated it using ATF.
If you don`t have out of round cilinders, this is the tool to deglaze the surface cilinder's walls. Assume it can be necessary to finish the surface with 240 grit (fine) hone before assemble new rings.