I don't know how many people have used these Clam clips but this big office version was new to me. I use my standard Clam dispenser all the time and you can still get them at JetPens or Ebay but I do like this large desk model. I have used it at my desk and it works fine. Everybody should have one at your desk and the smaller one in your bag. This larger desk model was issed through US Goverment channels. Replacment clip can be bought through Ebay but I have found that after a while you start to keep track of the clips so you never run out. Add one to your collection.