This tool is used for disassembling the stock, mounting rails, and adjusting the optics on the P90 & PS90. It allows the operator to perform most conceivable field adjustments and modifications- from dialing in an Eotech to striping the stock and trigger pack down to individual parts. A must for all owners and operators. This tool is a real value and improvement over the earlier two-part multi tools. The tool is now in it's second generation and features better grip, higher compatibility with aftermarket optics, and supperior placement of the lanyard hole. Its thick, non-slip handle offers maximum torque and requires little dexterity. This highly evolved tool has been perfected to the nth degree, right down to a rounded tip on the hex drive that helps the tool to find the socket and is less apt to scratch your bolts.