Yakima SKS Lock Cores. These are the heart of the Yakima SKS system, and are easy to install in every rack and mount that have the words "lockable with SKS cores" next to them. Yakima SKS Lock Cores are available in 2, 4, 6, and 8 packs. Buy the pack that fits your needs.
Yakima part #07206
racks and mounts that have "lockable with SKS cores"