Marks Door Handle For Storm Doors Marks Series 21 Unilock Entrance Handle Set Left Hand Reverse Door Knob

Marks Uni-lock 21AC Mortise Lockset for 1 or 1-3/4 inch thick steel security doors or ornamental iron doors

Important Keyway Information:
1 inch thick door option comes with a Marks "A" Keyway (Kwikset KW1)
1-¾ inch thick door option comes with a Marks "C" Keyway (Schlage SC1)

Round inside and outside knobs with trim plates.
Used primarily with Steel Security Storm Doors.

Function: Active Entrance Handleset, Keyed on Both Sides
Face Plate: 1 by 7-1/8 inch.
Door Thickness: 1 inch door (standard), 1-3/4" door (optional, special order; please allow 4-8 weeks)
Backset: 2-1/2 inches from faceplate to center of holes for lock or handles.
Mortise Box: 5-1/2 by 3-3/8 inches
Color Options: Polished Brass, Brushed/Satin Chrome, Oil-Rubbed Bronze, Antique Brass
Handing: Left Hand Reverse as shown
Locking function can be changed. Please see MORTISE LOCK INFO below.
Keying: Double Cylinder, 2 keys.

MORTISE LOCK INFO:
The key can be installed ABOVE or BELOW the handle on OUTSWING security doors.
When the lock is inverted it changes the locking function.
Please see images for a visual reference.

Key Below Knob:
Viewed From Outside, Hinges on Left, Handle on Right = Right Hand Reverse (RHR) --> see 301073
Viewed from Outside, Hinges on Right, Handle on Left = Left Hand Reverse (LHR)

Key Above Knob:
Viewed From Outside, Hinges on Right, Handle on Left = Right Hand Reverse (RHR) --> see 301073
Viewed from Outside, Hinges on Left, Handle on Right = Left Hand Reverse (LHR)

NOTE:
Please read all Handing Information before placing your order.
Please see additional pictures for a visual reference.

How to change a left hand reverse Marks mortise lock to a right hand reverse mortise lock (and vice versa)