Smartwatch Accessories -Silver Winding Stem For 100 Pieces Set For 7009 Automatic Movement Tools Description: Material: Stainless Steel Length: approx. 18mm / 0.71inch, thin part thickness: approx. 0.2mm Watch stem for ETA 46941, 46945, 8200, 8205, 7009, 2836 self-winding movements. Getting into the movement and operating the watches setting mechanism. One side goes into the movement and the other screws into the crown. Works with many Swiss watches. Package includes: 100 Pieces Watch Winding Stem Note: As the above size is measured by hand, the size of the item you received may be slightly different from the above. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.