Set of 4 serving cart wheels/ casters, matching for serving cart, designed by Herbert Hirche, manufactured by Christian Holzäpfel.
May also work for other carts.
1. Remove tiny screw with slot screw driver
2. Take care, don’t loose the ball above the bolt, while pulling out the wheel.
3. Insert wheel with ball. You may use minor grease to keep swiveling smooth.
4. Screw in screw as tied, that the wheel still swivel.