1,Saving Your Time: This sliding gauge for wall panels allows for easier installation, improving accuracy. Compatible with 5/16in thick wall panels, it is suitable for old or new 5/16in thick or fiber cement wall panels. 2,Good Material: This lap sliding gauge wall panel tool is made of durable one piece tempered high carbon steel and will not damage the surface of the pre coated wall panel. 3,Quick Positioning: This wall panel installation kit is very useful throughout the entire wall panel project and can save you a lot of time. 4,Easy Installation: Use these overlap gauge wall panel measuring instruments for settings without labeling or adjustment. For contractors, craftsmen, and DIY enthusiasts. 5,Wide Application: This board mounting gauge wall panel tool for wall panels is designed specifically for all 5/16in thick wall panels, suitable for full width fiber cement wall panels, vinyl wall panels, and wood wall panels, 5.25in, 6.25in, 7.25in, 12in, and more. Not suitable for the rear wall panel. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.