Years back I contacted Mitch the owner of Mesa Tactical as I love his stuff and featured his products on my AI&P Tactical Shotguns. I told him if he took the install parts for his Mesa Shell holder and simply changed the two left side screw to the same as the right side he would have an Anti Walking trigger plate set for the Remington Shotgun. He loved the idea as he already had all those parts so started offering these.
If you have a receiver mounted shell holder you don't need these as the shell holders pins serve that purpose. If not then you may want these for heavy use duty guns.
This set fits the 12ga 870, 1100 and 1187.
These come with all parts and tools to install them. A tip is to make sure you remove the D clips from the front and rear barrel pins on your trigger plate assembly as those are there only to hold the factory pins and not need with this set.