[Modular Design for Flexibility] - This stair measuring jig includes three extension parts: 16 inches (A), 12 inches (B), and 8 inches (C). These can be combined as needed, providing a measurement range from 16.2 inches up to 60.1 inches, offering adaptable functionality for various tasks. [Perfect for Multiple Woodworking Projects] - Ideal for installing wooden floors, building stair treads, or measuring closets and windowsills, this stair jig is suitable for a wide range of applications, making it a valuable tool for both hobbyists and professionals. [Compact and Gift-Ready Storage] - The stair tread measuring jig is easy to store and organize. The included storage bag helps keep all components together, preventing loss of small parts. Its clean design also makes it a thoughtful gift for woodworking enthusiasts. Color: As Shown Material: Aluminum Alloy Note: Due to different production batches, variations in product appearance and printed text may occur. These differences do not affect functionality. Package Contents: 1 x Stair Measuring Jig Kit Note: Light reflection and differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error is +/- 1-3 cm.