The Braille Pattern Dots-267 symbol (⡢). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Braille.
The quickest way is to copy ⡢ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
⡢ is U+2862 (decimal 10338).
Use ⡢ in HTML to render ⡢ on a web page.
On Windows you can type it with Alt+10338 (hold Alt and enter the number on the numeric keypad).
Yes — copying is completely free and unlimited, and works right in your browser with no sign-up.