Precisions Measurement: This right angles clamp features high Precisions design for optimal accuracy in every measurement, ideal for complex stair structures and construction. Lightweight Construction : Made from aluminum alloy, combining lightweight portability with durability, perfect for professional who need long lasting tools. Installation Design : Not require extra tool for fast setup, significantly improving efficiency—ideal for contractors and DIYer enthusiasts handling multiple measurements. Versatile Application : Suitable for not only stair measurements but also square structure tasks, making it a must have for carpentry, metalworkers, and builders. Package includes: 2Pcs Tall Stair Gauge