Maybe one of these similar products would be of interest:-

Balelinko Multi Grip Set of 2, Barbell Rack Holders Dip Grip Handles, Dip Bar Attachments for 2" x 2" Tube Power Cage, Bonus a Pair of 2" Spring Clip Collars Rings

Spring Clip Collars Weight Dumbbell Handles for Standard 1-inch Bars Pair

Spring Clip Collars Weight Dumbbell Handles for Olympic 2-Inch and 1-inch Bars

Barbell Clamps Dumbbell Spring Clip Circlip Collars 1 Inch Weight Bars Clips Fit

Spring Clip Collars for Olympic Barbell 2-inches, Barbell Collar Clip