Y-Shaped seams can seem daunting, so many people avoid them. This tutorial shows you how to do it! Y shaped seams are used with Tumbling Blocks, Hexagons, 60 degree diamonds, mitred borders and Attic Window blocks, to name a few! Fabrics - Craft Cotton Company Sewing machine - Brother FS130QC Threads - Gutermann This is a Tumbling block quilt design - fun and fast!