Assuming that I've got the correct MBP, according to iFixit - <
https://www.ifixit.com/Guide/MacBoo...+Early+2015+Lower+Case+Replacement/38513> MacBook Pro 13" Retina Display Early 2015 Lower Case Replacement - iFixit Repair Guide - you'll need a P5 Pentalobe screwdriver to unscrew the case back.
You'll also need a T5 Torx screwdriver to unscrew the SSD. <
https://www.ifixit.com/Guide/MacBook+Pro+13-Inch+Retina+Display+Early+2015+SSD+Replacement/38520> MacBook Pro 13" Retina Display Early 2015 SSD Replacement - iFixit Repair Guide
The second guide explains how to get at the SSD.
