They are the same ones that come with all Tikka T3 rifles. Only difference is in the middle of the part number, there is a S or T, depending what gun they came with.
Not sure what makes them more special than any other similar swivels, but just shipped a set yesterday to a guy in Namibia. He paid $40 for the set. They are $45 through Brownells.
Last edited by KenMi; 02/21/17.