●1. ACCURATE ALIGNMENT: Grid lines ensure precise alignment for a professional, polished finish, enhancing the quality of your project. ●2.THICK, DURABLE FOAM - With the 0.75 thick foam material, pinning your work becomes a breeze. The lightweight yet sturdy boards offer perfect surface to pin your projects, preventing any shifting. ●3.EASY ASSEMBLY - Say farewell to struggling with ill-fitting blocking boards. The interlocking design of the KnitIQ Blocking Mats allows you to customize the size ●4.READY FOR USE - This 9-pack set comes with all the essentials needed for blocking. The included reusable bag keeps mat organized & accessible. The T-bar head of the T-pins enables painless insertion ●5.HEAT & STEAM RESISTANT - The KnitIQ Blocking Mats are heat-resistant, allowing you to safely steam blocked pieces without any detrimental effects on the foam or grid lines. Steam with confidence.