Printed with ASA Carbon Fiber Filament - These Fabrication Jigs alow you to square and center your 3" x 3" x 1/4" Baseplate to an 1 1/2" Square, 1 1/4" Square, 1" Square, 1 1/2" x 1" Rect. , 1 1/2" x 1/2" Rect. Posts with ease!