New Bottom Case Screws (Pentalobe x10) Replacement for MacBook Pro Retina 13" A1425 / A1502 & 15" A1398 (2012-2015) (Retina Screws(1set/10pcs) We have good after-sales services. We share the latest information of laptop spare parts in Chinese market with all our customers This is NOT an easy job for someone who has no technical skills with Disassembling or Assembling laptop, So only purchase this item if you know how to install it. Each screws is tested before shipping and working .