Spec: Item Type: Door Handle Lock Set Material: Manganese Steel Gross Weight: 920g / 32.5oz Color: Black Lock Panel Size: 18x5x3.7cm / 7.1x2.0x1.5in Applicable Thickness: 3.5-5cm / 1.4-2.0in Panel Thickness: 0.9cm / 0.35in Lock Center Distance: 5cm / 2.0in Purpose: Household universal door lock How to Use: 1. Insert the lock body into the lock body hole with the thickness of the door, and tighten two self tapping screws after alignment;2. Insert the square bar into the square bar hole of the lock body, install the external handle parts, and tighten two tapping screws after alignment; 3. Install the inner handle parts, and tighten two self tapping screws after alignment;4. Insert the one way lock head into the lock hole from the inner handle side. Package List: 1 Pair x Door Lever Lock 1 x Lock Cylinder 3 x Keys 1 x Lock Cylinder Screw 1 x Back Box 1 x Square Bar 1 x Lock Body 1 x Iron Sheet 4 x Lock Body Screws 2 x Panel Screws