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Bloc Loc's Half Rectangle Triangle Ruler set includes 2 grooved rulers in a 2:1 Ratio. The 2:1 ratio is the industry standard for quilt patterns. Each ruler measures 2.5" x 4.5" and can be used for any size HRT unit smaller than the rulers. These rulers can be used for smaller projects, and work for blocks up to 12 inches.
Bloc Loc's patented technology makes the tough job of squaring up easy and fast. The groove slides along the seam to trim smaller units and allows quilters to rotate the block without lifting the ruler.
Instructions included. Watch the video for a demonstration.