80lbs Cast Iron Grip Standard 1 Inch Dumbbell Weight Set

Thank you for your feedback—we’re glad to hear you found the set easy to use and convenient for changing plates.

Regarding the concerns you mentioned:

Paint flaking around the center hole can sometimes happen with cast iron plates due to friction when sliding them on and off the bar. This doesn’t affect performance, but we’ll share your feedback with our product team to explore more durable finishing options.
As for the collars loosening, this can happen over time with threaded dumbbells—especially during dynamic movements. We recommend tightening the collars firmly before each set, and some users find that adding a rubber washer or using a spot of grip tape between the collar and plate can help keep them more secure.
We appreciate your input—it helps us continue improving our products.