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A side knob patio door privacy lock with steel bolt to prevent sliding or lifting of door. Adjustable for ventilation or full security. Compatible with 1-3/8″ – 1-3/4″ in. thick doors and a 1/4″ in. drill hole in the fixed-panel rail.
- Size 2″ x 2-1/4″ in.
- For use on interior and exterior sliding doors
- Residential, commercial and industrial use
- Available in Aluminum Finish
Manufacturer Resources
Product Specs
- Product Group:
- Door Trim and Accessories
- Product Subgroup:
- Door Trim and Latch Protection
- Product Type:
- Lever
- Commercial/Residential:
- Commercial
- Subcategory:
- Door Trim and Latch Protection
- Product Category:
- Door Trim and Accessories
- Department:
- Door Hardware
Pro-Lok EPL-111-AL – Frequently Asked Questions
1) Will the Pro-Lok EPL-111 patio door lock fit my sliding glass door?
The EPL-111 side knob patio door lock works on sliding doors with a panel thickness of 1-3/8 to 1-3/4 inches, and it needs a 1/4 inch drill hole in the fixed-panel rail. The lock body itself measures 2 by 2-1/4 inches. If your slider falls in that thickness range and you can drill the fixed rail, it mounts.
2) Does this patio door lock stop the door from being lifted out of the track, or just from sliding?
Both. The EPL-111 uses a steel bolt that blocks the sliding panel from moving in the track and from being lifted out of it, which is the usual way a slider gets defeated.
3) Can I leave a patio door cracked open for ventilation and still have it locked?
Yes. The Pro-Lok side knob patio lock is adjustable, so you can set it to hold the door open a gap for ventilation or close it down to full security. That is the main reason to pick it over a fixed bar or a dowel in the track.
4) Is the Pro-Lok EPL-111 rated for commercial use or is it a residential lock?
It is catalogued as a commercial-grade item and is stated for residential, commercial and industrial sliding door use, interior or exterior. Property managers can standardize it across apartment sliders and office patio doors alike.
5) What tools do I need to install the Pro-Lok patio door lock?
Installation comes down to a single 1/4 inch hole drilled through the fixed-panel rail, so a drill and a 1/4 inch bit for the rail material is the core of it. Pro-Lok publishes an installation guide for the EPL-111 covering the layout.
6) Is this a keyed lock or a thumb-operated one?
The EPL-111 is a side knob privacy lock, operated by hand from the inside rather than by key. If you need key control or a cylinder that suites to a master system, this is not that part.
7) What model and finish does the Pro-Lok side knob patio door lock come in?
One configuration: model EPL-111-AL, in aluminum finish. There is no other finish or handing choice to specify, which keeps it simple when you are buying for a building's worth of sliders.
How fast can I get the Pro-Lok EPL-111-AL delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pro-Lok EPL-111-AL come with a warranty?
Absolutely. The Pro-Lok EPL-111-AL is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pro-Lok EPL-111-AL?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Pro-Lok EPL-111-AL from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.