High Quality: Our Stair Gauges Set is made of durable, high-quality aluminum alloy with an anodized surface, ensuring long-lasting performance. Advanced Design: Comes with an anti-lost holder and a portable hook, making it easy to carry and store anywhere, anytime. Extra Spare Parts: The set includes two extra large thumbscrews for replacement. Plus, it comes with a multi-functional key chain that doubles as a bottle opener and a measuring ruler. Multi-functional Usage: This tool is perfect for stair stringers, rafter layout, framing square attachments, and angle cuts with circular saws. It's compatible with most squares under 8mm thickness, excluding Ruobi and Dewalt smaller plates. A Must-Have Tool: This Stair Gauges Set is a game-changer for stair builders, as it eliminates the need to realign frame squares for each step, ensuring consistent, precise layouts every time.