



When your sliding door mortise lock is broken or old, don’t replace the door entirely, just get a new mortise lock! This Prime-Line E 2121 Mortise Lock has an adjustable, spring-loaded hook latch projection for surface-mounted sliding patio doors constructed of wood, aluminum and vinyl with handle sets with 45-degree angled keyway positions when in the locked position. It also fits doors using W&F manufactured handles. The mounting hole centers of this lock measures 3-11/16 inch from center to center, and the rear housing corners are square. Selection Tip: To ensure the perfect match is selected prior to purchasing, the lock will need to be removed to compare the following 4 features (besides the width of housing): 1) The distance of the mounting holes measured from center to center, 2) The faceplate ends; rounded or square, 3) The position of the slotted keyway when in the locked position; at 45-degree angle or vertical, and 4) The shape of the housing corners at the rear; square or slanted. Installation Tip: Watch the manufacturer’s How-To Video that is linked to this item page.
| Manufacturer | Prime-Line Products |
| Part number | E 2121 |
| Item Weight | 127 g |
| Product Dimensions | 1.27 x 2.86 x 9.37 cm; 127.01 g |
| Item model number | E 2121 |
| Size | 3-11/16 in. |
| Color | Zinc |
| Style | Modern |
| Material | Aluminum Zinc Alloy Steel |
| Shape | Round |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Special Features | Keyway Lock |
| Included components | Mortise Lock |
| Batteries Included? | No |
| Batteries Required? | No |
A**R
Stopped locking
After a few months it started getting to the point of needing to flip the lever multiple times before it actually latches. After about 8 months it has stopped latching entirely.
G**P
Fit perfectly if you match the same number.
Get exactly same number of the one you replaced. Others are close but do not work. We dropped the old one down inside the door and tried a heavy duty magnet on a string to retreated it. It was like fishing, took a while. After I got the correct replacement it took 2 of us to install new one. One person to make sure I didn’t drop it again. Works great now.
H**N
Dimensions not quite as stated but able to make it work.
Though the listed dimensions claim to be the same as my existing lock they are a little off. The top hole didn't quite line up for the handle screw and the face of it is slightly too wide to fit in the door cutout. Because of this, the whole lock housing sits inside the door a bit instead of being flush. One thing not explained in the product description is that you engage the lock by moving the locking lever up instead of down. Flipping the unit upside down would not work with my door.
S**.
not good
This did not work on my slider. Spring does not wrok
L**G
Finally found replacement
Worked great. Fixed a sliding glass door that has not worked. With it to buy
Trustpilot
2 days ago
3 weeks ago