http://crypmixbfndnamclmopwglewgbx4kmy7w3kehmst3yds5j6tb4tthdyd.onion/faq.html
If you feel insecure sending large amount of coins, you have the choice of sending money over a longer period of time in a number of transactions instead. The code within the mixer ensure your coins are never mixed with your own coin and sent back.