ToolScript + Stacks (Break In Style)

local Tool = script.Parent

local player = game.Players.LocalPlayer

Tool.Activated:Connect(function()
    if Tool:WaitForChild("stacks") and Tool.stacks.Value > 1 then
        Tool.stacks.Value -= 1
        player.Character.Humanoid.Health += 50
    else
        Tool:Destroy()
    end
end)