Easy to install, you can replace your existing front door handle yourself without any skills.Name: door handleLock tongue material: zinc alloyPanel material: zinc alloyLock tongue type: double lock tongue (oblique tongue + square tongue)Lock core material: zinc-clad copperCenter distance: 58mm/2.2in[Adaptive door thickness]: 35-50mm/1.3in-1.9inFinish color: gold powder, gold blue, blackDoor opening direction]: Regardless of left and rightHandle material: rubberLock margin: 45mm/1.7inMaterial of marbles: copper marblesWith key: with key/without keySuitable for indoor or outdoor doors, as well as bedroom, garage doors.