The Noveske Benelli M1 hook mount sling plate is a steel replacement for the factory buttstock sling loop. The replacement sling plate has an extended loop large enough to accept an HK style hook or a Mash style hook. The plate is constructed of steel with a Parkerized finish.
The Benelli M4 buttstock uses the same loop but it was not designed to be removed from the stock. Installation of the Noveske plate should be performed by a qualified gunsmith or armorer.