[Note]This wrench only fits flag-style door hinges, not all types.Ensure the hinge isn't flush against walls/door frames.To use it smoothly, read product info, measure your hinge size, and confirm it matches this door hinge adjustment tool before buying [Core Function]As a multi-functional hinge adjustment tool, it fits 8-19mm flag-style door hinges. It fixes common issues like door sagging, stuck opening/closing, misalignment, and uneven gaps-this door gap adjustment tool restores smooth door operation [Compatible Types and Operation]This dual-head door hinge tool works for fire doors, cleanroom doors, security doors (with flag hinges), and as a door hinge adjustment tool residential.Turn left to widen gaps, right to narrow them. Even beginners can use this door alignment tool easily [Performance Advantages]This heavy-duty door gap adjustment tool is fully steel-welded. It's sturdy, handles daily pressure without bending/breaking, and needs no extra door hinge bender. It stays stable for long-term use [Ease of Operation]As a convenient door adjustment tool, it enables precise adjustments. Its dual-head design simplifies work-use it as a hinge tweaker or basic door hinge tool to save time on alignment or hinge tweaks [User-Friendly Design & Scene Adaptation]It has an ergonomic handle for comfort and a compact shape for tight spaces. Easy to store/carry, it fits home door repair and professional use. It also works as a hinge hole adjustment wrench for minor tweaksStainless Steel