Phillips Fiber Art SQ15 15 Degree Squedge Ruler
A Wedge + A Square = A Squedge! Wedges make circles, but Squedges make squares. The 15 Squedge makes a 16in finished square (16.5in unfinished) with 24 Squedge pieces. The slots in the tool let you mark precise lines for making the shorter pieces. The longer pieces are used for the corners and the shorter for the inner sides.