[Modular Design for Flexibility] - This stair measuring jig comes with three extension parts: 16 inches (A), 12 inches (B), and 8 inches (C). You can mix and match them based on your project's needs, with a measurement range stretching from 16.2inches all the way up to 60.1inches. It's a truly customizable tool for any task. [Perfect for Multiple Woodworking Projects] - Whether you're installing wooden floors, crafting stair treads, or measuring for closets and windowsills, this stair jig has you covered. Its wide range of applications makes it essential for both hobbyist woodworkers and professionals. [Compact and Gift-Ready Storage] - this stair tread tool jig is easy to keep organized. The bag helps prevent misplacing small parts, and its sleek design makes it a great gift idea for anyone who enjoys woodworking, from dads to DIYers. Colour: Material:Aluminum Alloy Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * stair measuring jig kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.