Most new interior doors are mortised for rounded-corner hinges — but plenty of doors, especially older ones, were cut for square corners. The Design House 181479 is the branded 3-pack for exactly those doors: 3.5 inch steel hinges in satin nickel with proper square corners.
Design House is a hardware-store brand, and the 181479 is its square-corner workhorse: steel construction, a six-hole staggered pattern, mounting screws in the box, and a manufacturer rating of up to 50 lbs per hinge. It holds a 4.6 out of 5 average across 1,028 Amazon ratings.
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The short answer
Buy the 181479 3-pack if your door’s mortises have square corners: name-brand steel hinges in satin nickel with screws included and a 1-year manufacturer warranty, rated 4.6 out of 5 across 1,028 ratings. Rounded mortises? This hinge will not drop in — the radius-corner sibling below is the same brand in the other corner style.
What you’re getting
Three 3.5 × 3.5 inch hinges in steel with a satin nickel finish — one standard door’s worth. The square corner is the whole specification: it matches the mortises on doors that were routed or chiselled square, which is common on older homes and on doors that predate the rounded-corner standard.
Per Design House’s own specification sheet for this model, the leaf is 100% steel at 0.085 inch gauge with a six-hole staggered pattern, and the box includes #9 × 3/4 inch mounting screws. The brand rates each hinge for up to 50 lbs, which is comfortable territory for a standard interior door on three hinges.
Specs
| Model | Design House 181479 |
| Size | 3.5 in. × 3.5 in. |
| Corner | Square |
| Material | Steel (0.085 in. gauge, per Design House) |
| Finish | Satin nickel |
| Holes | 6 per hinge, staggered pattern |
| Load rating | Up to 50 lbs per hinge (manufacturer rating) |
| Pack size | 3 hinges, mounting screws included |
| Warranty | 1-year limited (manufacturer) |
The good and the not-so-good
- The right corner: square-corner mortises are underserved by the rounded bulk packs.
- A real hardware brand with a published spec sheet and a 1-year warranty.
- Screws included — #9 × 3/4 inch, sized by the manufacturer for the hinge.
- Left- or right-handed doors alike.
- 1,028 ratings at 4.6 — a deep base for a corner style most packs ignore.
Worth knowing before you buy
- Square corners will not drop into rounded mortises without re-cutting them — check your door first.
- A 3-pack covers one door; whole-house jobs cost more per hinge than bulk packs.
Who they’re for — and who should skip them
Owners of older doors with square-cut mortises, and anyone replacing like-for-like Design House hardware in satin nickel. If your doors were hung square, this is the drop-in branded option.
Skip it if your mortises are rounded — most modern pre-hung doors are. The same brand’s radius model below covers that door, and the 4 inch sibling covers heavier doors.
Fitting them
- Compare one old hinge against the new one — corner shape, size and hole pattern — before removing anything else.
- Work one hinge at a time with the door still hanging.
- Seat the new leaf in the square mortise and drive the included screws.
- Work top to bottom, checking the swing as you go.
Worth comparing
Design House 181412 — the radius-corner sibling
The same brand’s 3.5 inch satin nickel 3-pack in the rounded style, with water-resistant, pre-lubricated pins, rated 4.7 out of 5 across 2,760 ratings. If your mortises are rounded, this is your Design House pack — full detail in our 181412 review.
Design House 181594 — the 4 inch version
One size up in the same brand and finish, for heavier doors, rated 4.6 out of 5 across 3,576 ratings. See our 181594 review.
Questions people ask
Square or rounded — how do I know which I need?
Look at the corners of the hinge mortise in your door edge. Square-cut corners take square hinges; rounded corners take radius hinges. They are not interchangeable without re-cutting the mortise.
How many doors does a 3-pack cover?
One standard door, at three hinges per door.
Are screws included?
Yes — Design House includes #9 × 3/4 inch mounting screws with this model.
Do they fit left and right-handed doors?
Yes, the model is sold for either handing.
The bottom line
Square-corner doors are the forgotten standard, and this is the branded pack that still serves them properly: steel, screws included, a published spec and a warranty. Check your corners, and if they’re square, this is the one.
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