Belt of the Grappler (5e Equipment)

Wondrous Item, legendary (requires attunement)

While wearing this belt, you gain the following benefits:

You can make a grapple check as a bonus action.
Creatures you are grappling are restrained, in addition to being grappled. When the grapple ends, the creature is no longer restrained.
You gain a +3 bonus to grapple checks, and Strength (Athletics) checks you make to prevent a creature from escaping from your grapple.