Design: Reinforced heavy-duty self-locking spring mechanism with fixed 90-degree positioning. It automatically locks at the unfolded horizontal position to bear heavy loads without shaking or collapsing; press the release trigger to fold flat, effectively cutting down storage space for foldable tables and stools. Lightweight: Thickened integral stamped metal structure provides outstanding load-bearing performance without excessive self-weight, resisting bending and deformation under long-term static load of tabletops and seating surfaces. Easy Installation: Standard evenly distributed pre-drilled mounting holes match regular wood screws perfectly, enabling rapid DIY installation on wooden table legs, portable stools and wall-mounted folding desks without cutting or grooving. Material: High-strength carbon steel with uniform anti-rust coating, built-in wear-resistant elastic spring maintains stable locking elasticity after thousands of folding cycles, not prone to fatigue loosening or fracture. Versatile Application: 4-piece heavy-duty folding leg hardware set for woodworking projects, widely applicable to camping folding tables, portable stools, wall hidden desks, multi-functional storage furniture and all space-saving household furniture renovation., Manufacturer: xhy0213