The strike pistol grip plug tool holder insert is a drop-in installation insert with compatible si pistol grip plugs.Directly install this tool holder insert into your the grip plug that is included with your si pistol grip and give yourself an instant added organized storage compartment.Securely store multiple punch, hex, torx, firing pin reservoir and other similar tools.The small reservoir is included with this strike pistol grip tool holder insert that safely stores backup oil, grease, threadlocker and similar materials.The designed divider slots help prevent the tools from rattling around in the si pistol grip cavity.