SteelCore says:

Lockable straps with SEW (steel encased webbing) - harder to cut through than steel cable alone.

Ideal for securing / soft pannier bags to the bike to help prevent theft or access to the bags. / soft panniers have a security block on the top of each pack designed for this purpose.

Also use to secure helmets or other packs when away from the bike.

Weather resistant stainless steel cam lock adjusts to the size of the pack and comes with 2 keys.