 Brother Industries manufactured the "Twinriter 5" (1985) and "6" (1987) printers which tried to overcome the limitation of the missing graphics capabilities of daisy wheel printers by adding a dot matrix print head to the existing daisy wheel print head, with the former being used for letter quality printing and the latter for drafts and for printing symbols which were not present in the daisy wheel character set.Thimble printers are closely related to daisy wheel printers, but instead of a flat wheel the petals were bent to form a cup-shaped "thimble" print element.Introduced by NEC in 1977 as their "Spinwriter" series, the replaceable thimbles each held 128 characters.