These frames are handmade with care and precision from local ash trees. They rotate 360 degrees, and tilt to your comfort. The gripper strips are positioned on a rounded hold your rug pattern taughtly with out the need for pins or tacks. You can move your pattern around simply and easily by lifting it. This way you can work on various areas of your mat with out any fuss. They are an excellent choice for starting rug hookers or the expert because they are practical, and portable. The opening measures 11 by 14".