Not everything Mick uses here is period correct, but there are period alternatives to some items. The jag, which in the 18th century was called a worm for instance. The modern jag used cloth to clean the bore, where as the worm was used with toe. But the worm can also use a strip of cloth to do the same job. The screw is used to extract a round ball if it should for some reason become stuck in the bore. But Mick explains the uses for his gear pretty well, so I will not bother going any further. If you have any questions, just ask.