HauSun Patio Door Handle Set + Mortise Lock 45° Perfect Replacement for Sliding Glass Door Fits 3-15/16” Screw Hole Spacing, Non-keyed with Latch Locks,White Diecast,Reversible Design

A busted patio door handle has a way of making a whole door feel past its prime. I installed the HauSun patio door handle set on a well-used vinyl slider to see if an inexpensive replacement could bring the door back to life without a call to a locksmith. Short answer: it can—provided your door matches the common 3-15/16-inch screw spacing and you’re fine with a non-keyed exterior.

What’s in the box and what it fits

The kit is straightforward and complete for most replacements:
- Interior handle with thumb latch
- Exterior pull (non-keyed)
- 45° mortise lock (hook-style)
- Mounting screws in three lengths

It’s a reversible, non-handed setup, so it works whether your door opens left or right. The 3-15/16-inch screw hole spacing is the critical spec here—measure your existing handle center-to-center before you order. The mortise lock is sized for the common pocket used on wood, aluminum, and vinyl sliders. If you’re replacing a builder-grade assembly from the past couple of decades, there’s a good chance it will drop in.

Installation: DIY-friendly with a couple of caveats

Swapping this in was very doable with a Phillips #2 screwdriver and needle-nose pliers. The process, step by step:
1. Remove the old interior/exterior handles (two screws).
2. Slide out the old mortise lock from the edge of the door and compare the orientation.
3. Insert the new 45° mortise lock into the pocket and secure its faceplate.
4. Align the new interior and exterior handles, feed the appropriate length screws through, and tighten.

A few practical tips from my install:
- Magnetize your screwdriver or use a magnetic bit holder. The included screws are short and easy to fumble.
- Grip the mortise hook with pliers during insertion so the lock doesn’t slip into the door cavity.
- Test the latch engagement before final tightening. The adjustment screw on the mortise can help fine-tune hook depth, but doors that are way out of square may exceed its range.

On my door, the mortise fit without chiseling, and the 3-15/16-inch holes aligned perfectly. I did find that the painted alignment posts on the handle were a snug fit through the door skin; a little patience and a light hand got everything seated. If your door’s holes are tight from the original paint or slightly undersized, a quick clean-up with a round file can make alignment painless.

One note on screws: the kit includes three lengths for the handle through-bolts, which is helpful for different door thicknesses. If your original mortise faceplate screws strip during removal (not uncommon on older doors), be prepared to reuse them or source replacements—the kit I used focused on the handle screws.

Build quality and feel

The handles are die-cast and finished in white. In hand, the interior pull feels substantial for the price bracket, with a smooth contour that’s easy to grab. The exterior pull is a clean, no-frills piece—good ergonomics, no flex or rattles once installed.

The mortise lock itself offers a tighter, more positive action than the worn unit it replaced. With the strike adjusted properly, the hook engages with a reassuring snap rather than the mushy feel I had before. Is it a heavy-duty commercial lock? No. But for a residential slider, it’s solidly in the “better than builder grade” category.

The 45° mortise: why it matters

Not all mortise locks are the same; the 45° designation refers to the angle of the internal cam and the way the hook extends. If your old lock’s hook and faceplate look similar, this is likely the right style. If you’re unsure, pull your old lock first to compare. A mismatched mortise style can lead to shallow engagement or a latch that never quite catches.

Non-keyed by design

This kit is intentionally non-keyed and not convertible to a keyed exterior. For many patio doors, that’s fine—most people don’t need or want keyed access from outside. If you do need exterior key access, look elsewhere. If security is your concern, a secondary device like a patio bar or a pin lock in the upper rail offers more resistance to forced entry than most keyed pulls in this price range anyway.

Everyday use

Once installed and adjusted, the door felt genuinely renewed. The interior thumb latch is smooth, the handle has a sturdy hand feel, and the finish blends well with a white vinyl frame. There’s no wiggle or squeak, and the door slides and locks with less effort. The difference between a tired original handle and this fresh assembly is noticeable every time you open the door.

Fit and compatibility notes

• Screw spacing: 3-15/16 inches is essential. Don’t guess—measure.
• Door material: Works with wood, aluminum, and vinyl as long as the mortise pocket matches.
• Door thickness: Multiple screw lengths help, but measure and choose the shortest that fully engages threads without bottoming out.
• Mortise pocket: If your pocket is tight or not perfectly flush, a little filing may be required. That’s more a door issue than the hardware, but worth noting.

Installation pitfalls to avoid

• Overtightening die-cast parts can strip threads. Snug is enough.
• Make sure the strike on the jamb and the hook are aligned; adjust the mortise before chasing the problem with extra force.
• If the door is out of square, you might run out of adjustment range. In that case, adjust the door rollers first to re-square the panel in the frame.

Durability and upkeep

The die-cast construction and baked-on finish should hold up to normal indoor/outdoor use. Keep the mortise mechanism clean and lightly lubricated—dry Teflon or a silicone-safe lubricant is better than oil, which can attract grit. Don’t spray heavy lubricants into the mortise cavity; a small hit on the hook pivot and the latch cam is plenty.

Value

For the price, getting both the handle set and a new mortise lock is the right call. Reusing a worn mortise with a fresh handle is often a false economy; the crisp action I felt came from replacing both together. This set lands in a sweet spot: not premium hardware, but a clear upgrade over tired factory parts without overspending.

What I’d improve

• Instructions are serviceable but brief. A clearer diagram for screw length selection and mortise adjustment would help first-time DIYers.
• The alignment posts could benefit from a slightly looser paint tolerance to avoid interference on tight door skins.
• Including a pair of extra faceplate screws for the mortise would save a hardware run when originals are stripped.

Who it’s for

• Homeowners with standard 3-15/16-inch screw spacing needing a quick, clean refresh.
• DIYers comfortable with a screwdriver who want a reversible, non-keyed setup.
• Anyone replacing a worn mortise-and-handle combo on wood, aluminum, or vinyl sliders without switching to a keyed exterior.

Who should look elsewhere:
- Those who need a keyed exterior pull.
- Doors far out of square or with nonstandard mortise pockets; you may need a different lock body or more extensive carpentry.

Recommendation

I recommend the HauSun patio door handle set for standard, non-keyed replacements. It installs cleanly, feels sturdier than aging builder-grade hardware, and the 45° mortise gives a confident lockup once adjusted. The reversible design and included screw lengths make it flexible across common door builds. Be ready with a magnetized screwdriver, consider keeping your old faceplate screws as backups, and take a moment to square and adjust your door before final tightening. If you need keyed access or your door’s mortise is atypical, pick a different kit; otherwise, this is a cost-effective, practical upgrade that makes a well-used slider feel new again.