Praxis Kit

Praxis kits are consumable items in Deus Ex: Human Revolution.

Game effect
Once used, they will award the player with one Praxis Point. Kits may either be purchased for V 5000 at LIMB Clinics, or simply acquired elsewhere.

Praxis points are also regularly awarded for accomplishing objectives. Kits are simply a reward for exploration (similar to the skill bonuses that were awarded in Deus Ex).

Detroit

 * Inside a box shortly after exiting an elevator in the Sarif Industries Milwaukee labs.
 * The LIMB Clinic in Detroit (two can be bought for 5000 credits each, restocked on second visit to this hub). Also one from sidequest from doctor on second visit to detroit.
 * Detroit Downtown Apartments, third floor of the westmost building, inside an illegal augmentation 'chopshop' with a level 5 security door (code to get in: 2356), then hack the level 2 terminal, then hack the level 1 computer for the final code into the area with the kit).
 * 2011-08-27_13.14.44.jpg the Derelict Row sewers in a hidden area accessible by breaking through a wall. Location of wall is shown by Jensen icon in the image.
 * One in Sandoval's apartment across the street from Adam's place. Be careful, it's bait. (only appears when the primary quest sends you here.)

Heng Sha

 * Behind a breakable wall in the sewers below the Hung Hua Hotel in Hengsha.
 * The Limb Clinic in Hengsha (two can be bought for 5000 credits each, restocked on second visit to this hub).
 * On the corpse of the bartender at The Hive. (You can also get this one by paying him 5000 to free the girl from debt, during his side quest.)
 * A reward from Malik after doing the side mission for her.
 * In the bottom of an elevator shaft in Hengsha Court Gardens. (Access from the southwest roof via a hackable door or breakable wall.)
 * On the second floor of the Tai Young Medical building, in a desk drawer in a medical room above the Lee Geng Lab.

Montreal

 * In one of the cubicles in the Picus Communications building.