This is 12″ A1534 Gold Color Bottom Screw.
Compatibility:MacBook Retina 12” A1534
MacBook8,1 Early 2015 (Gold): MK4M2LL/A (1.1 GHz Core M)
MacBook8,1 Early 2015 (Gold): MK4N2LL/A (1.2 GHz or 1.3 GHz Core M)

Screw Driver with two ends 1.2mm 5 point size end (P5 Pentalobe) (For MacBook 12″) and 0.8mm 5 point size end (P5 Pentalobe) (For iPhone)

Package Include :1pc Screwdriver + screw (8pcs/set