Based on reviews I ordered this and some rings and I find it interesting that so many think these easy. They're not. I literally worked at it for hours and was unable to open them easily to add keys. Of this two piece set the second piece was easy because you unscrew it and can attach it to a ring but I'm still unable to attach keys to the ring. I had high hopes for this based on the reviews and was very disappointed. I still needed to use a fingernail to open the rings but was still unable to get keys on it without a third hand. I don't understand why others say it was easy, the concept is but as they say the proof is in the pudding and this pudding just did not gel! Some day I'll try some friends to see if they can do it any easier but it just did not work for me and I'm pretty resourceful, the type that doesn't stop till it's done and this one is not done.At first the ring was stiff and hard to use. After a coup a of three months it has come around. I decided to only use the ring as the rest would make it hang to low. I use it to attach the pouch containing my cell phone to my belt. Works just fine. Very useful.Design is great!Muy hermosoReally cool concept. I love the flexi titanium arms. NOT STRONG! NOT APPROPRIATE FOR ATTACHING HEAVY THINGS! not quick to attach or release things. In fact I have found that detaching my water bottle from it is very awkward.Strong and light weight.High endWell built nice product.