High-quality material selection------- Car Wagon Door Window Crank Handle Winder is made of CNC aluminum alloy, which makes it strong and durable, resistant to abrasion, not easy to deform and not easy to damage. Easy installation -------- Window Crank Handle is easy to install, no need to modify, easy to use, equipped with 3/8 inch round and 3/8 inch square adapters. Perfect replacement ------ It is a good replacement for old or broken ones. The inner diameter of the round adapter is about 10 mm/0.39 inch, and the ring spline adapter is about 11 mm/0.43 inch. Quality Assurance------- Car Wagon Door Window Crank Handle Winder is manufactured in accordance with standard specifications and strictly follows factory quality control. Please rest assured to buy. Easy installation -------- Window Crank Handle is easy to install, no need to modify, easy to use, equipped with 3/8 inch round and 3/8 inch square adapters. High-quality material selection------- Car Wagon Door Window Crank Handle Winder is made of CNC aluminum alloy, which makes it strong and durable, resistant to abrasion, not easy to deform and not easy to damage. Perfect replacement ------ It is a good replacement for old or broken ones. The inner diameter of the round adapter is about 10 mm/0.39 inch, and the ring spline adapter is about 11 mm/0.43 inch. Quality Assurance------- Car Wagon Door Window Crank Handle Winder is manufactured in accordance with standard specifications and strictly follows factory quality control. Please rest assured to buy.