King Root is presently the Best Rooting tool / App available for root android device. KingRoot Download APK and desktop version Supports android 2.2 through android 5.0 [ v4.5] versions which is Android 2.2, 2.3, 4.0, 4.3, 4.4 and android 5.0 This is the #1 One Click Root tool for your android device. Just download --> Install and Follow rooting guide.
One Click Root For any Android Device - Remote rooting
KingRoot APK 4.5 - Latest Direct download links