Tony Iommi is frequently referred to as the inventor of heavy metal with his trademark riffs powering the legendary Black Sabbath. Having sliced off the ends of three fingers in a factory accident when first starting out Tony switched to very light gauge strings. These make his bracelet especially unique. (Photo courtesy of Jackie Jethon.) See more at www.iommi.com 

Profits from the sale of Tony Iommi's strings go to Nordoff Robbins: Nordoff Robbins is a national music therapy charity dedicated to transforming the lives of vulnerable children and adults across the UK. We use music therapy and other music services to help a range of people with a range of challenges such as autism, dementia, mental health problems, stroke, brain injury, depression and life-threatening or terminal illnesses, such as cancer. All of the people we help have one uniting factor - music dramatically improves their quality of life. See more at www.nordoff-robbins.org.uk