Kernel RPMs in the ftp sites.

I have noticed that there are RPM packages for the SuSE kernels in the update directories at the FTP site. There are packages for version 2.4.10 and 2.4.16 for several SuSE distributions, e.g. 7.3, 7.2, etc. There is no formal announcement nor any description on what these updates are for. YOU does not show it as an available update. Are they security updates? Is there a reason I should choose 2.4.10 over 2.4.16? etc. If someone has seen some description of these packages or announcement, I would appreciated it. Rafael