Probrico Keyed Entry Door Lock Knobs For use on interior doors requiring entry function, such as entrance or front doors. The Black finish add a modern and fashion feel to your home or office. Probrico Door Locks Features: Pure Copper Lock Cylinder Pure copper lock cylinder, strong durability5-pin tamper-proof brass cylinder with nickel plated brass key, wear-resistant and corrosion-resistant; Full inner Door Knob Full inner ball, the riveting position of the inner ball is longer, the firmness is stable, the ball head is not easy to skew and loosen High anti-theft coefficient Solid colum security bolt to provide anti-sawingprotection.Solid stainlesssteel latch bolt available for high security. Sturdy Internal Structure The material is 65 manganese steel, the manganese content reaches 0.9%;The wear resistance is strong and relatively stable, and it can pass the three-level standard 250,000 wear resistance tests. Easy Intallation Exterior & Interior Door KnobThree Keys(Keyed Alike)2 Long Screws & 2 Short ScrewsAdjustable LatchStriker PlatePlastic Cover Reversible Levers Universal/reversible operation knobs, suitable for right-hand and left-hand doors; Adjustable Backset Latch has adjustable backset 2-3/8" to 2-3/4" to fit all standard door preparations:Fits doors thickness:1-3/8 inch to 1-3/4 inch (35mm to 45mm); Comfortable Touch Designed round ball handle, no sharp edges, and will offer a comfortable grip Available in Other Function Keyless Privacy Lock Knobs Bathroom keyless privacy lock, mainly suitable for interior doors such as kitchen, bathroom, study, children's room, etc. The outside slot (without key) can be opened with a coin or a slotted screwdriver in an emergency. Passage Door knobs Designed for doors inside the house; offers reliable closure but without a locking feature;Making it a common choice for a room that doesn’t require privacy, such as a closet, hallway, or pantry. Single Dummy Door Pulls Single dummy/inactive knob or trim function: is surface mounted on doors where only a pull is required.