ADJUSTABLE GAP WIDTH: This wrench enables you to widen gaps by turning left or narrow them by turning right, providing precise adjustments to suit various door types and hinge setups. DURABLE CONSTRUCTION: Made from high-quality steel, the Wrench is built to last. Its durable construction can withstand regular use without bending or breaking, ensuring long-term reliability. IDEAL FOR SPECIFIC HINGES: Specifically designed for use with fire doors, cleanroom doors, and security doors equipped with flag hinges. It ensures proper alignment and functionality of these specialized door types. EASY OPERATION: The ergonomic design and simple operation make adjusting door hinges straightforward, even in tight spaces or challenging installations. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Colour:Photo Color Material:steel Applicability:19mm for 15mm-18mm/23mm for 20mm-23mm/25mm for 23mm-25mm Package Contents: 1x Hinges Gap Adjusting Wrench Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.