The parts of the Oh S#IT Kit are housed in a tin with a magnetic base that keeps all the parts sorted. On the inside of the lid is a to-scale image of all the included parts so you can easily identify each spare part. From screws to pins to detents, the RISE Oh S#IT Kit contains spare parts that can be impossible to find if dropped. This parts kit includes: Buffer Retainer (x1), Buffer Retainer Spring (x1), Anti-Walk Pin Screws (x2), Takedown & Pivot Pins Detents (x2), Takedown & Pivot Pins Springs (x2), Safety Selector Detent (x1), Safety Selector Spring (x1), Firing Pin Retainer (x1)