What event would i use to make the player that touches the right arm take damage?

Now that I have the punch and a cooldown for it what event do i use to make it so that if the right arm touches a player it does damage to the player

player = game.Players.LocalPlayer mouse = player:GetMouse() animation = script:WaitForChild("Animation1") enabled = true mouse.Button1Down:Connect(function() if enabled then enabled = false

local animationTrack = player.Character.Humanoid:LoadAnimation(animation)
animationTrack:Play()

wait(1)
enabled = true

end

end)

???????