How to equip a tool when pressing a keybind?

I have a keybind script, and I want the player to be able to equip a tool when he/she presses Q, except I dont know how to make the tool equip after pressing Q. I tried game.Players.LocalPlayer.Backpack.Item:Equip()

local Player = game.Players.LocalPlayer
Mouse = Player:GetMouse()

Mouse.KeyDown:connect(function(Key)
	if(Key:lower() == "q") then
		Player.BackPack.PDA:Equip()
	end
end)

Through the Roblox default backpack system it's pretty simple! Here's a source to help you out. Tell me if you come across any issues and don't forget, this is on the Humanoid! (not the player directly)