Alignment and Fitment: The primary function of a Door Adjuster is to that the vehicle's door aligns correctly with the door frame and fits snugly when closed. This alignment is crucial for maintaining the vehicle's aerodynamics, preventing air and water leaks, and providing security and safety Correction of Misalignment: Over time, due to wear and tear or minor impacts, a vehicle's door may become misaligned, resulting in issues such as door gaps, uneven fit, or difficulty in closing. Door adjusters allow for precise adjustments to correct these alignment issues, ensuring that the door functions correctly. Universal Truck Car Door Hinge Adjuster This car door adjustment tool is designed to correct door sinking issues and proper alignment. Name:Door regulator calibration tool Type:Corrective tools Fitment:Universal Colour:Silver Material:Metal Package Contents: 1 * Door correction tool 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.