Some braille slates are part of a frame such that a two-line slate can be stepped down a page to give a whole page of braille.
Plastic slates are lighter than metal ones but the hinges tend to have a lower life expectancy.
Frames without hinges only work with a fixed size of paper, but are very popular as a pocket note-taking device. The design of the handle of the stylus significantly affects the ease of use, but the larger handles are less convenient to carry in the pocket. Braille Slate Four line large writing slate, plain with plastic stylus. Braille Slate Two line small writing slate, interline with plastic stylus and fixed clamp. Frame Four line small writing frame with 28 cells and plastic stylus.