SaveToolsScript + TeleportService

local TeleportService = game:GetService("TeleportService")
local ToolsFolder = game:GetService("ServerStorage"):FindFirstChild("SavedTools")
local DataStoreService = game:GetService("DataStoreService")
local SaveData = DataStoreService:GetDataStore("SaveData")

game.Players.PlayerAdded:Connect(function(player)

    local ToolData = SaveData:GetAsync(player.UserId)

    local Backpack = player:WaitForChild("Backpack")
    local StarterGear = player:WaitForChild("StarterGear")

    if ToolData ~= nil then
        for i, v in pairs(ToolData) do
            if ToolsFolder:FindFirstChild(v) and Backpack:FindFirstChild(v) == nil and StarterGear:FindFirstChild(v) == nil then
                ToolsFolder[v]:Clone().Parent = Backpack
                ToolsFolder[v]:Clone().Parent = StarterGear
            end
        end
    end

    player.CharacterRemoving:Connect(function(character)
        character:WaitForChild("Model"):UnequipTools()
    end)
end)

game.Players.PlayerRemoving:Connect(function(player)
    local ToolsTable = {}

    for i, v in pairs(player.Backpack:GetChildren()) do
        table.insert(ToolsTable, v.Name)
    end

    if ToolsTable ~= nil then
        SaveData:SetAsync(player.UserId, ToolsTable)
    end
end)