Letter size Freehand Designer Clipboard. Draw Perfect Straight Lines Totally Freehand. Ideal for quick and neat on-site surveys and plans. Compatible with 81/2&rdquo; x 11&rdquo;. Clipboard has locking lever clip and lip along left hand side and top to enable perfect alignment of paper. Enables drawing of horizontal and vertical straight lines freehand when placed under sheet of paper. 1 Grid allows user to do drawings to scale Independent product reviews here https://www.amazon.co.uk/dp/B01EVF2UNY Built-in hanging hole.