Swanson Tool Company Framing Wizard Folding Aluminum Framing Square in the Squares department at Lowes.com $8.87

Folding framing square. Prices vary store to store around me. Shows in stock in all my local store with prices varying from as low as $6.97 to 14.97 so YMMV
Brickseek link https://brickseek.com/lowes-inventory-checker/?sku=50258621
https://www.lowes.com/pd/Swanson-…e/50258621