Double Click / blind people pencil

This is Braille design which blind people can use for their Braille writing. Basically, blind people engrave six dots in the square box when they write vowels, consonants, and punctuation marks. When we suppose that we engrave every single dots in the square box, we have to engrave six times. However, we can only engrave four times by using ‘Doubleclick.’ It will bring remarkable result for blind people when they write Braille.