I got my three Genius Swivel head ratchets and I must say I am really impressed... They are just as fine and smooth as my snap on... The snap are 49 teeth I think and these are 72. If any one is interested in pictures I will take them apart and post the pictures... Let me know, they are held together but a hex head metric bolt which I think is better than the little ring that is a pain in the *** on the snap on models....