Whoops! Kit comes in packaging that makes it easier to wrap as a gift for Holidays, Birthdays, or Other Special Occasions! The Whoops Kit comes with the Springs and Detents that can easily get misplaced when you are installing them and/or replacing them. Includes the following items: Bolt Catch Detent Bolt Catch Pin 3/32" x 1/2" Coiled Pin Bolt Catch Spring Buffer Detent Buffer Detent Spring Disconnect Spring Magazine Catch Spring for AR15 Safety Selector Detent for AR15 Safety Selector Spring Take Down Pivot Pin Detent (2 needed per rifle) Detent Take Down Spring (2 needed per rifle) Hammer Spring mil spec 1/8 x 5/8 coiled Roll Pin for Trigger Guard Trigger and Hammer Pin for AR15 (2 needed per rifle) Trigger Spring single stage mil-spec.