Extra large, gridded 12" x 18" slotted ruler.
Easy to use; simply place ruler on fabric and cut using your 45mm rotary cutter.
Cut multiple strips from 1/2" to 18" in 1/2" increments. Sub-cut to create 1/4" and 3/4" incremental strips.
Turn Shape CutPlus after strips are cut to complete squares, triangles, diamonds, bias strips and fringe. 
Detailed instructions and charts, included with ruler, make it easy to cut multiple strips in 1/4" increments