🔐 Lock in style and security—because your door deserves the best.
The MARKS Knob Assembly Kit for 21AC Mortise Lock is a robust, easy-to-install solution crafted from premium brass and iron. Designed for security storm doors, it features an ambidextrous handle, a compact 1.75-inch projection, and includes all necessary components for a seamless upgrade. Durable, stylish, and built to last, this kit ensures your entryway stands out with both function and flair.
| Material | Brass, Iron |
| Brand | MARKS |
| Color | Brass |
| Exterior Finish | Brass, Iron |
| Special Feature | Easy to Install, Sturdy |
| Included Components | Knob |
| Item Weight | 1.5 Pounds |
| Metal Type | Brass, Iron |
| Handle Material | Brass |
| Hand Orientation | Ambidextrous |
| Projection Distance | 1.75 Inches |
| Unit Count | 1 Count |
| Manufacturer | MARKS |
| Item Depth | 1.75 inches |
| Handle Attachment Mechanism | Through-the-Door |
| Lock Type | Key Lock |
| UPC | 084015016270 |
| Part Number | K21ACX |
| Item Weight | 1.5 pounds |
| Is Discontinued By Manufacturer | No |
| Finish | Zinc |
| Item Package Quantity | 1 |
| Number Of Pieces | 6 |
| Special Features | Easy to Install, Sturdy |
| Batteries Included? | No |
| Batteries Required? | No |
L**H
Perfect replacement
The knob assembly was a perfect match for mine that was broken and easy to replace. Works great.
M**D
Marks Knob replacement is exact part!
This is the replacement part that Marks locks recommended. It is the exact replacement needed. Smooth transaction. Thanks!
A**C
Great product.
I used this product to replace the broken knob on my security door. This product was easy to install and performed exactly like the original.
L**A
Great Replacement
I am a DIY’er and it was a little challenging trying to figure out which way the knob went back on. My knob had broken off and I did have anything to reference but I figured it out and it works great. Very satisfied with my purchase.
S**N
GREAT!
I finally had this installed on January 3rd by somebody that knew what they were doing. He had no issues. I finally have a door knob that does not fall off every time... LOL and was way worth the money.
D**T
Exactly as described
Product was exactly as pictured and included everything needed for installation.
R**Z
Less expensive
Very expensive
A**C
Perfect match!
Perfect match!
Trustpilot
2 months ago
1 month ago
