Bobblehead - Sneak

Bobblehead - Sneak is a miscellaneous item $$ It permanently improves the Lone Wanderer's Sneak skill by 10, up to a maximum of 100.

Location
Found in the yao guai den in the yao guai tunnels on top of a metal box north-east of the big irradiated pool of water, reached by heading down the north tunnel, and through a door.