Creative Grids 15 Degree Triangle Ruler allows to sew together 24 of Creative Grids 15 degree triangles to create a complete circle; 12 to create a semi-circle; or 6 to create a quarter-circle. Create Fans, Dresden Plates, etc. up to a finished size of 48 inches with this EXCLUSIVE Quilting Template and Ruler. This quilting ruler triangle shaped, comes with marked 1/4 inch seam allowance. Cut 30; 45; 60; and 90 degree units as per the requirement with the CLEAR Angles Marked on the triangular ruler. Use the Vertical Lines to Fussy Cut Stripes or Cut Half-Triangles. 15 Degree Triangle Quilting Ruler has a PREMIUM Gripper which holds the fabric for smooth cutting. Scan QR Code printed on this quilting ruler to view a video demonstration.