Is There Any Reason to Have Dumbbells in a Home Gym?

HVACR: Is there any reason to have dumbbells in a home gym? HVACR. Performance: This guy's an air conditioning repair, with an R at the end. He made this new GED and is probably on the phone with Wolf Blitzer every day. The least useful thing in my gym is that rack of dumbbells. Thank you for your service.