Here is the blurb from the Kickstarter:
Dungeon Grappling brings those thrills to the oldest fantasy RPG with rules and examples for several editions from the OSR, PFRPG, and Fifth Edition. It unifies the mechanics with those of weapon combat, providing for simplicity and flexibility in execution. Everything from simple wrestling to throws, locks, and choke holds are given mechanical guidance. Plus, of course, support for fearsome talons, crushing jaws, and grasping tentacles.Check out the Kickstarter and help fund this fantastic supplement!