Adjustable Arm: The dual L-shaped rotating arms offer flexibility to precisely adapt to different stair angles, including straight, corner, and spiral staircases. This stair measuring tool is perfect for construction, interior design, or DIY projects, easily handling various complex stair shapes. Dual Metric and Imperial Scales: Both the main bar and edge arms feature metric (millimeters) and imperial (inch) scales, ensuring compatibility with international building materials. No Conversion Required—this universal stair layout tool is ideal for precision work on both local and international building projects. Sliding Stair Measuring Tool: This adjustable stair tread measuring tool features a smooth sliding track for precise length adjustment up to 1640mm. No connectors or additional tools are needed; simply stretch it to use. Its efficient design outperforms traditional stair measuring clamps, making it ideal for professionals and DIY enthusiasts alike. One-Handed Locking and Anti-Slip Design: This adjustable stair layout tool features a user-friendly knob locking mechanism for quick one-handed length and angle adjustments. Its anti-slip handle ensures stable, while the foldable "edge locking" section on the ABS connector firmly grips the stair treads, making it easy for DIY enthusiasts of all skill levels to use. Service: If you have any questions, please feel free to contact us, and we will reply within 24 hours!, Manufacturer: ZHJOPP