for Glock 42 Grip Frame Plug Black NDZ Bible Psalm 144:1 for Glock 42 Grip Frame Plug Aluminum NDZ Black 1000+ High Resolution Permanent Laser engraved images, will not rub off, not painted, custom engraving too - by NDZ Performance Fits flush, prevents snagging Billet Aluminum plug includes set screw, allen wrench for installation and removal 100% Aluminum - NOT plastic. Also helps guide mag. into magazine well