Maxima series steel bases. I have a paired base M902/876M that will fit Remington 700 Long and short action. One of the pieces was never mounted, the other was and shows light wear, 9.5 out of 10 condition. Then I have a single base, M924M. This was also slightly used, a 9.5 out of 10. If you use the M902 with the M924 then you have a mount set for a Winchester Model 70 (which is what these had come off of). I'm selling all 3 together for $22 shipped so you would have the bases for either configuration.