Marks USA K9117/26D Satin Chrome F Function Turnpiece Kit 22AC Mortise Double Cylinder Lock

Marks USA K9117/26D Satin Chrome Turnpiece Kit

This Marks USA mortise lock kit provides an F function turnpiece assembly finished in satin chrome. It is designed for use with the 22AC or compatible mortise double cylinder lock bodies. The kit suits commercial and residential doors requiring a keyed exterior with interior turnpiece operation. Installers receive the components needed to complete the lock trim on a prepared mortise pocket.

Sustained Operation and Durability

The mortise lock construction distributes operating forces into the door stile rather than relying on a cylindrical chassis. This design maintains consistent latch retraction and bolt throw over repeated daily cycles. The satin chrome finish resists wear on high-contact surfaces such as the turnpiece and cylinder collars. The kit supports long-term reliability in offices, schools and multi-family buildings where traffic volume is continuous.