About this item10 silver screws to secure the aluminum bottom case for all Retina MacBook Pro laptopsIdentical replacements for the original screws, complete w/ blue threadlocker to keep screws in place.Compatible for MBPr 13" Late 2012 (MD212LL/A, MD213LL/A), Early 2013 (ME662LL/A), 2013 (ME864LL/A, ME866LL/A), Mid 2014 (MGX72LL/A, MGX92LL/A), Early 2015 (MF839LL/A, MF841LL/A, MF843LL/A)Compatible for MacBookPro10,1 Retina Mid 2012 (MC975LL/A, MC976LL/A, MD831LL/A), Early 2013 (ME664LL/A, ME665LL/A)Compatible for MacBookPro11,2 IG - Late 2013 (ME293LL/A), Mid 2014 (MGXA2LL/A), Mid 2015 (MJLQ2LL/A) Compatible for MacBookPro11,3 DG - Late 2013 (ME294LL/A), Mid 2014 (MGXC2LL/A), Mid 2015 (MJLT2LL/A)