Multi-functional staircase measuring folding ruler, made of aluminum alloy. Multiple sections of ruler rods can be freely combined and adjusted. The knob locks for positioning. The scale is clear. Suitable for measuring and laying out stair treads, cabinets, and irregular corners. Comes with spare parts and storage bag. Convenient for carrying and storage. Applicable for layout in woodworking and decoration sites, as well as DIY processing.

The main body is made of durable aluminum alloy, ensuring strength and resistance to bending or deformation. The surface features anti-rust treatment, making it highly resistant to corrosion even with prolonged use in harsh construction environments. Equipped with multiple adjustable sliding rulers—8-inch, 12-inch, and 14-inch sections—that can be freely combined and locked into place using tightening knobs, the tool offers simple adjustment. Once tightened, the ruler segments remain securely fixed, ensuring stable and accurate measurement data. Both ends are fitted with graduated metal stops featuring clear markings for easy reading and direct marking of cutting positions.This multifunctional stair square is a commonly used measuring and positioning tool for carpenters and renovation workers. It is ideal for layout and marking tasks involving stair treads, window frames, cabinets, and various irregular contours, helping construction personnel quickly obtain precise measurements, reducing the hassle of repeated on-site measurements and improving renovation efficiency.

In stair construction, it enables quick determination of tread height and depth, allows one-time replication of tread outlines, and transfers dimensions directly onto panels without repetitive calculations or manual marking. Beyond stairs, it is also suitable for cabinetry, door framing, ceiling installation, tile laying, and furniture fabrication. It effectively handles irregular edges, angled cuts, and multi-angle workpieces by accurately copying contours and setting angles. The complete set includes spare locking knobs, mounting screws, and a storage pouch, allowing convenient organization after use to prevent part loss and enabling easy transport between job sites.

Easy to operate and user-friendly, simply loosen the knobs, adjust the ruler segments to the desired length and angle, align with the object, confirm proper contour contact, then tighten all knobs to lock the shape. Transfer the tool to the material and trace along the metal stop edges directly. The ruler segments are detachable, allowing flexible use as single or multi-section combinations depending on project needs, adapting to workpieces of various sizes.

Maintenance is straightforward: wipe off dust and wood chips after use and store in a dry place to protect the scale markings and metal components. This practical measuring aid is an essential tool for home improvement carpenters and DIY enthusiasts, streamlining complex angle measurements and layouts while minimizing human error. Ideal for on-site layout work and contour replication, it is a reliable choice for diverse renovation and woodworking applications.