A set of 8 crosshairs that utilize black areas to ensure that the crosshair is visible regardless of background. Technically there are only 4 crosshairs, and then the same 4 crosshairs with a circle around each.
For best results, set cl_crosshair_scale to 24. Any bigger than that and they begin to look a little ugly.
1) Unrar in your ..\Steam\steamapps\USERNAME\team fortress 2\tf\ directory, retaining file structure.
2) Start Team Fortress 2.
3) Click on "Options".
4) Click on the Multiplayer Tab.
5) Under "Crosshair appearance", use the pulldown menu to select the crosshair of your choice (those in this pack are crosshair10 through crosshair17).
Please note that it is possible that server admins will use sv_pure with a whitelist that does not include assets from this directory, resulting in the black/magenta "no texture found" texture. In this case, you'll need to select a Valve crosshair on those particular servers.