Records over the years have been cut at many different speeds. Originally, they were cut at '78 RPM' or speeds around that value. Later the industry decided to cut all records at 33 ½ or 45 RPM. For speech recordings even slower speeds were used in order to increase the amount of time recorded on each side of the record: 16 ½ and 8 ½ RPM. Of course you want to enjoy a recording at the correct tempo, but sometimes record players do not play at the proper speed and need adjusting. For that purpose Tonar now offers an Aluminium stroboscope disc of 10 cm diameter with the speeds 8 ½, 16 ½, 33 ½, 45 and 78 RPM.