Removable Bubble & Guide: Features an oversized 1.4 " Detachable with weighted for stability and foam Printed measurement guides help space multiple frames evenly for gallery displays Compatibility: Includes 4 keys that work with hangers, D rings, and other common hardware Simply press the to wall positions precisely not measuring or guesswork needed to family photos in 30 seconds Clicks Line Clamp systems: the folded hook to frames, then press to instantly positions without extra pins Soft backing protects from scratches and, ideal for wire mounted artwork Quick & Accurate Marking: Our pending hanging tool marks positions in seconds with just placement, press, and hammering The built in bubble ensures perfectly horizontal alignment for wall decor, picture frames, and art projects of all sizes Compact 12 inch ABS Design: yet reinforced ABS tool extends to 12 inches for various sizes Folds flat to 0.59 " Thickness for easy storage in drawers or toolboxes while remaining always handy