To some using a hand pump is an inconvenience and they look for an automatic solution.
There are different types of extender devices some come with a noose, grip system or vacuum. The best will let you mix and match.
There are plenty low-quality penis pumps everywhere sold as gag. Therefore, is important to find a robust pump with a quality pressure gauge.
Everybody likes to use bare hands to exercise the Penis shaft. There are gadgets that can make it easier.