I've been on the receiving end of this manner of confusion too; started with a compressor and 'kit' from B&Q, added a longer, non-springy hose and a number or different air tools off ebay and none of them have the same connectors. Ordered two different sets of adapters, none of them allow me to use any of the new kit either! Some are tantalisingly close to fitting, but either *just* don't fit or leak when they are connected. I have very annoyingly been restricted to using just original kit that came with the compressor! :evil: