For a multiple product order, we will make every attempt to ship all products contained in the order at the same time. Products that are unavailable at the time of shipping will be shipped as they become available, unless you inform us otherwise.  The most common reason why multiple boxes are used for a single order is that ThreadToolSupply.com has multiple warehouse locations.  If items are stocked in different warehouses they cannot be boxed together.  Whether your order comes in one or multiple packages, rest assured that you will only be charged the amount quoted to you during the checkout process.