Kreg Concealed Hinge Jig - 35mm Cup Drilling Jig - Adjustabl

The Verdict

Installing concealed hinges without a jig is a guaranteed way to ruin a door. The cup hole needs to be dead-center, exactly 35mm wide, and precisely 12-13mm deep — a fraction off and the hinge binds, the door sags, or the screw misses the pilot hole entirely. The Kreg Concealed Hinge Jig exists to eliminate that anxiety, and after working with it across a full kitchen re-face, I can tell you exactly where it earns its keep and where it doesn’t.

What’s Actually in the Box

Kreg keeps the package lean: the aluminum jig body, a 35mm guide bushing pre-installed, a 30mm adapter bushing, and the two side clamps. That’s it. No router, no bit, no depth stop — you’re expected to supply those yourself. The jig itself is CNC-machined aluminum with a hard anodized finish, and the guide bushing slides out for cleaning or replacement. The adjustable fence on the back is the headline feature: it moves in 1/16-inch increments and locks with a knurled knob, accommodating door thicknesses from 5/8" to 1-1/8" without shims.

Performance in the Real World

The first thing you notice is the clamping system. Two spring-loaded side clamps grab the door edge, and the fence rides against the face. You position the jig using the etched centerline marks, align it to your hinge spacing, and lock it down. The whole setup takes about 20 seconds per door once you’ve done it twice.

I ran 14 doors through this jig with a plunge router and a 35mm Forstner-style bit. The cup holes came out clean, centered, and at a consistent 13mm depth across every single door. The aluminum bushing holds the router base steady — no wobble, no drift, even on the maple doors I was working with. The stop block on the fence edge lets you set a fixed distance from the door edge, which means if you’re installing 20 identical hinges, you only measure once.

Where the jig shines is repeatability. The adjustable fence means you’re not relying on eye-balling the door thickness or stacking washers to get the cup positioned correctly. Set it once, and it’s right for every door that size.

What Buyers Keep Saying

The 4.7-star rating holds up when you read through the feedback. One reviewer put it plainly: “I’ve used cheap jigs that needed clamping and re-clamping. This one just sits there and does the job. The aluminum body is worth the extra money.” Another noted the durability: “Dropped it off a ladder onto concrete. Just a scuff. The bushing still runs true.”

The adjustment mechanism gets consistent praise. A kitchen remodeler wrote, “The fence adjustment is what sold me. I went from 3/4” doors to 1/2" plywood cabinet doors and didn’t need a second jig." That tracks with my experience — the range covers standard cabinet construction without modification.

Where It Falls Short

The honest downsides start with the accessories. Kreg expects you to have a router, a 35mm bit with a depth stop, and a guide bushing. If you’re a hobbyist without a router, you’re looking at another $60-80 in tooling before this jig does anything useful. The jig itself is priced at a premium — typically $50-60 — and it’s not a complete solution.

The side clamps are the weak point on narrow stock. On doors under 12 inches wide, the clamps sit close enough to the router base that you’ll hit them mid-plunge. I had to loosen, reposition, and re-clamp on a few narrow cabinet doors. It’s not a dealbreaker, but it’s annoying when you’re in a rhythm.

The depth control is entirely on your router bit. The jig positions the hole, but it doesn’t regulate depth. If you’re using a bit without a depth stop, you’re guessing. Kreg sells a matching bit with a stop collar, but that’s another separate purchase.

Who Should Buy This

If you’re installing Euro-style concealed hinges on new cabinet doors, or replacing old face-frame hinges with soft-close hardware, this jig is the right tool. It’s equally suited to a weekend DIYer doing a kitchen refresh and a professional who needs consistent results across dozens of doors. If you only need to mount three hinges on a single cabinet, borrow a jig or skip it — the setup learning curve isn’t worth it for one door.

FAQ

Q: Does this work with all brands of concealed hinges? A: Yes, as long as the hinge uses a 35mm cup (which is the standard for Blum, Salice, Hettich, and most Euro hinges). The 30mm adapter covers smaller cup styles, but those are uncommon.

Q: Can I use it with a drill press instead of a router? A: Technically yes, but it’s not ideal. The jig is designed for a plunge router with a guide bushing. A drill press with a 35mm Forstner bit can work if you remove the guide bushing, but you lose the depth control and the bushing’s centering benefit.

Q: What’s the minimum door thickness it handles? A: The adjustable fence goes down to 5/8" (16mm). Below that, the cup depth of 12-13mm leaves too little material and the hinge won’t seat properly.

The Verdict

Buy it if you’re installing more than a handful of concealed hinges and want consistent, repeatable results without measuring and re-measuring every door. The aluminum construction, adjustable fence, and clean bushing system justify the price for anyone doing cabinet work regularly.

Skip it if you’re mounting a single hinge, don’t own a router, or are working with doors thinner than 5/8". You’ll spend less money and less time with a different approach.

Rating: 4.6/5 — Kreg delivers a precision tool that does exactly what it promises, with the caveat that it’s not a complete kit. The clamps and depth responsibility are minor compromises on an otherwise excellent jig.

Where to Buy

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Last updated: 2026-08-06. Ratings and prices current as of review date. Verify on Amazon before purchasing.