This build is awesome guys. Srsly try it out. And btw if you dont know why i have 7 items in my build then its because i sell my Dorans Shield and Buy a Hexdrinker instead!

Benefits to the items to Lee Sin:
Doran's Shield[/b]: It gives u armor, health and a lot of HP-regen. Good item in the beginning. Especially if u solo.

Mercury Treads: Gives u a bigger chance not to let ur enemies escape if they disable u.

Wiggle's Lantern: Look I chose this item because it's awesome. It gives u armor, lifesteal, damage and a passive so you can place a ward every 3 minute! U can sell this item if u don't think its good enough. Maybe buy a Bloodthirster or somethin.

Frozen Mallet: This item is just great for Lee Sin! For the first, you slow ur enemy and makes u more powerful and deadly. And second, it gives freaking much health! In my opinion this is a must-item for Lee Sin!

The Black Cleaver: **** man! Black Cleaver!? Why? Because its Awesome!!!! Armor Penetration every attack u deal (5-stacked) And u get damage and attack speed. A perfect item for Lee Sin imo.

Last Whisper: Last Whisper is not awesome becasue of the damage. 40 damage aint much, right? But it's passive. 40 armor Penetration!!! Thats like +40 damage extra to your enemy!! Now this item is OP for Lee Sin in 1v1.

Hexdrinker: I chose Hexdrinker because it just fitted in perfectly! It gives u damage, magic resist and a passice which is really good against magic nukers. Like teemo and his mushrooms. The passive is: If you would take Magic Damage which would leave you at less than 30% of your Maximum Health, you first gain a shield which absorbs 300 Magic Damage for 4 seconds. OP!!!

Generally:
Lee Sin is a sick 1v1 champ, and if somebody is jungling on ur team u could easy take the solo-job. But don't think that u cannot die. Lee Sin is cool champ and easy to learn. Try him out sometime.