Thumb Screws for Secure Attachment Equipped with durable black oxide steel thumb screws designed for a secure, nonslip grip. Easy to tighten or loosen by hand, even when wearing gloves. Attaches firmly to any raft frame, ensuring stable and reliable use. Lightweight design allows for easy portability and quick setup. Versatile Main Application Ideal for stair longitudinal beam layout and rafter layout tasks. Works effectively with a wide range of materials, including wood, metal, and composite structures. Especially useful when working with wooden materials that have crevices or gaps, enabling precise and secure setup. Suitable for both professional construction projects and DIY installations. Replacement Part Fine workmanship and precise manufacturing ensure smooth compatibility with existing systems. An replacement for wornout or damaged stair components. Designed for consistent performance, restoring functionality and extending equipment life. Aluminum Alloy Construction Built from quality aluminum alloy for strength and durability. Anodized finish offers enhanced wear resistance and protection against corrosion. Sturdy yet lightweight, making it easy to handle and install without sacrificing performance. Designed to withstand demanding environments while maintaining a polished appearance. Practical Use Scenarios 1. Residential stair frame setup, where secure attachment and alignment are essential. 2. Outdoor rafter installation for decks or pergolas, providing stability on uneven surfaces. 3. Onsite construction work involving wood with gaps or irregularities, ensuring accurate positioning. This stair component delivers dependable performance, versatile application, and durable construction — making it a practical choice for both replacement needs and installations.