Ragg Tuning Forks operates in Sheffield as the UK's longest-established manufacturer of the precision acoustic device, a business line it entered in 1841 after decades making cutlery. Production now reaches global markets across multiple sectors: musicians tune instruments with them, medical practitioners use them for hearing tests and neurological screening, sound therapy practitioners employ them for therapeutic sessions, and manufacturers utilise them to calibrate equipment such as radar guns.

Manufacture remains labour-intensive, with each fork machined and filed by hand from a single piece of metal, then cooled before frequency verification, as thermal changes affect pitch. Technicians modify frequency through selective filing or by attaching weights—a practical approach that avoids elongating the fork excessively for lower pitches. Whilst traditional demand from the music sector has contracted, the sound therapy market has emerged as the company's fastest-growing segment, allowing the manufacturer to sustain a product line spanning nearly two centuries.