This is a Grade 2 auxiliary deadbolt from Stanley Security. It is a single cylinder deadbolt built for a small format interchangeable core (SFIC). It adds a separate deadbolting point to a door that already has a primary latching lock. Part QDB281 619 R4 FLR LC is the Single Cyl SFIC Less Cylinder, Radius 2-3/4, Full Lip Radius Strike version in Satin Nickel.

• Single Cyl SFIC Less Cylinder
• Radius 2-3/4
• Full Lip Radius Strike
• Finish 619 Satin Nickel
• Part number QDB281 619 R4 FLR LC