The product arrived on time, well packaged and as described. The product offers a very good mechanical connection to the Silca "Hiro" side lever Presta drill chuck. I couldn't find any other way to connect the Silca "Hiro" cartridge to the air hose, so I had no choice but to purchase this item. I give four stars because I think the price is a bit high for what you get. However, as there are no other options available to my knowledge, this is a good and necessary article if you are using a Silca