KnitIQ Blocking Mats for Knitting &ndash; Extra Thick Blocking Boards with Grids with 100 T-pins and Storage Bag for Needlework or Crochet - Pack of 9 ASSEMBLE INTO MANY DIFFERENT SIZES AND SHAPES. The interlocking boards are simple to put together and stay firmly in place, to fit your individual project. GRID LINES FOR PRECISE BLOCKING. Grid markings allow you to align the sides of your project and block squarely for an accurate, professional finish. MADE FROM THICK, DENSE FOAM. This durable, light material is 0.75 thick. It keeps your knitting, crochet or lace work taut and allows pin holes to heal each time which means your mats will last for years to come. INCLUDES STORAGE BAG AND T-PINS. Each KnitIQ blocking set comes with a reusable storage bag with handle for easy packing of all 9 mats to save you space, as well as a pack of 100 pins with smooth T-bar head for ease of use. EXCLUSIVE TO AMAZON. A new all-in-one kit designed in partnership with experts, the KnitIQ blocking set is a best in class solution that will allow you to produce professional projects every time.