Senshi Japan Standard 25mm Lock Collar Clamp Clips for weight training bars such as dumbbells and bar bells. The collars are designed specially for the use with extremely heavy weights in order to provide top security and pure efficiency, now allowing the user to use just one hand. Comes as pair
These are plastic collars and suitable for only horizontal lifts. Only metals threaded collars are for vertical lifts. For any type of exercise, please first consult some specialist training instructors.