Eric hooked up the 280-grit honing attachment to a hand drill and started the process. Honing oil was constantly circulating during honing to keep the cylinder cool and lubricated and to also remove debris. Here's a shot of the honing slip (arrow), which acts like sandpaper in a way. Moving the hone up and down, Eric is basically scratching the cylinder walls to form the crosshatch pattern so that the scratches cross each other at a 60-degree angle. This crosshatch pattern retains lubricating oil to prevent galling and helps break in the new piston rings.