The Jumbo Lazy Angle Ruler is compatiable with the Lazy and Lovin It book, and all previously release lazy angle quilt patterns by Jaybird Quilts and Lazy Girl Designs. 
It is the easy way to make hundreds of geometrically inspired quilt blockss in finished sizes from 1 " to 8". with defined seam allowances , multiple cutting options, you can create unique and interesting quilt blocks and projects