Premium Material: The stair measuring tool jig is made of quality aluminum alloy, which is sturdy, wear resistant, not easy to break, and can be used for a long timeAccurate Stair Measurement Tool: It allows step installers to easily operate and adjust to the correct length and angle, easily and accurately obtain the required size of the stepPractical Tool: Stair tread gauge tool versatility makes it a must have tool for anyone working on renovation or construction projectsWide Application: The stair tread jig tool can be used to measure a variety of surfaces, including stairs, arches, curves, etcDesign:stair tread gauge tool measuring range is 8 inches to 56 inches, easy to use, is suitable for professional workers and DIY enthusiasts Specification: Material: Aluminum Alloy Size Chart: Package size: 28 cm x 35 cm x 7.5 cm/11.02 inch x 13.78 inch x 2.95 inch Package Includes: 1 SetStair Tread Template Tool Note: Please allow slightly errors 1-2cm differences due to manual measurement.