1 Pixel Square Eraser for Pixelated Digital Art

I recently started doing pixel art with these free brushes from Alberto Lozano ( https://www.artstation.com/marketplace/p/zqmL/pixel-art-brushes-style-for-photoshop ), but I couldn't find an eraser tool. 

With the new Photoshop update, you cannot just select the brush you want in the eraser mode, so I made this. 

Hope this helps!