Keyed Entry (Single Cylinder) Function: This knob set is locked and unlocked from the exterior using a key and can be locked and unlocked from the interior using the turnbutton located on the knob. Perfect for securing entrances side doors and anywhere else that needs a bit more security. Features: BHMA Security Grade 3 Designed for left or right handed doors Easy to install on standard doors Includes an adjustable latch to fit all standard doors Lifetime mechanical and finish warranty Two keys will be shipped per lock. This technology allows you to re-key your lock in seconds with 3 simple steps and features stainless steel racks pins and side locking bar for increased strength and security. Specifications: Backset: Adjustable 2-3/8 or 2-3/4 Cross Bore: 2-1/8 Edge Bore: 1 Door Thickness: 1-1/2 1-3/4 1-3/8 1-5/8 Handing: Left Right Reversible Knob Height: 2.4 Projection: 2.75 Product Weight: 1.24 lbs Latch Faceplate: R