Detective's Kit Level 3
Price 25 gp
This leather satchel contains empty vials, a pair of tweezers, a supply of small linen cloths, a set of brass calipers and a knotted string for measuring distances, several pieces of chalk, a pen, and a blank notebook for keeping notes. Every component of a detective's kit is of exceeding quality, and thus a detective's kit adds a +1 item bonus to checks to investigate a crime scene, a clue, or similar details.
Source Advanced Player's Guide pg. 249