Flat Size: 8.9x3.1 inches; Single Mounting Plate Size: 3.9x3.1 inch; Hole Centers: 1.5x1.9 inches Enhanced Safety: Provides a secure connection between ladder sections, reducing the risk of accidents during use Replacement Kit Functionality: Ideal for refurbishing old or damaged ladders, extending their usability and saving costs on replacements Corrosion-Resistant Materials: Constructed with materials resistant to rust and wear, suitable for long-term indoor or outdoor use Improved Weight Distribution: Designed to evenly distribute weight across the ladder, ensuring a more stable and comfortable climbing experience About the Manual Measurement: Please notice that due to the possibility of differences between manual measurement and mass production, there may be a slight error of 0.4 - 0.8 inch in the size information provided for reference