The Leftwards Harpoon Over Rightwards Harpoon symbol (⇋). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Arrows.
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+21CB (decimal 8651).
Use ⇋ in HTML to render ⇋ on a web page.
On Windows you can type it with Alt+8651 (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.