Choose Top-Matic magnet training system consisting of a dog training ball launcher and a Multi Power-Clip. You may use it as a dog ball launcher or attach it to your clothes by the special clip that comes in a set. The Multi-Power Clip will do for common clothes thickness like a T-shirt. A magnetic ball is attached also to metal surfaces. You may get a stronger Maxi Power-Clip for a thicker clothes like winter.
Look at more options of Top Matic balls and clips at the tab "SIMILAR PRODUCTS".
A magnetic ball has a strong magnet inside and is not recommended to be placed near electric and electronic devices!