UJK Technology

UJK Combined Chamfer & Reamer Tool

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  • Two tools in one: a reamer to restore the tolerances of your 20mm worktop holes, and a chamfer that enables the use of additional bench dogs like our Power-Loc and Smart Connect dogs--plus it makes the table top much more comfortable to work on!
  • Chuck it into your favorite drill and you're off to the races.
  • An exhibit of the cut quality you can expect. Note this tool is only appropriate for MDF, HDF or melamine faced plywood.
  • The tool automatically bottoms out, leaving you with the perfect depth of chamfer every time.
  • UJK Combined Chamfer & Reamer Tool


Designed and intended for use on MDF and HDF material; not recommended for hardwood veneer plywood.

Two Tools in One: Power Reamer & Chamfer

The Parf Guide System relies on the fine tolerance fit between the dog holes and the dogs—neither too tight or too loose. Changes in humidity can make it difficult to insert or remove 20mm dogs. Machined from stainless steel, this UJK Combined Chamfer & Reamer Tool does two jobs at once.

This 2-in-1 tool featuring a 10mm hexagonal shank can be used in your favorite cordless drill chuck (use at slow speed). The reamer portion has a gentle lead in and four cutting flutes to ream the holes to a precise size. With this woodworking multi-tool, your 20mm dogs will fit snugly without wobble yet can still be removed without difficulty.

After the reamer, the chamfer tool comes into action. It cuts a neat, shallow chamfer around the top of the dog hole. This chamfer allows full use of our Power-Loc or Smart Connect Bench Connecting Dogs, as well as Parf Super Dogs or any other 20mm dog that utilizes a lip. In addition, by removing the sharp edge around the hole, it prevents damage from repeated insertion of dogs, clamps and other accessories. The chamfer features a solid tungsten carbide cutter with four adjustable cutting sides. If it ever gets dull, which is unlikely, you can always rotate the carbide insert to another side.

Note: This cutter works best in MDF, HDF or plywood with a melamine facing. We do not recommended it for hardwood veneer plywood, where the high cutting speed of a traditional woodworking router and chamfer bit with pilot bearing will provide a superior result.

Key Features

  • Stainless steel, 4-flute reamer with TC chamfer cutter
  • Restores tolerance of tight dog holes in bench tops
  • Chamfer allows full use of our Power-Loc or Smart Connect Bench Connecting Dogs, as well as UJK Parf Super Dogs
  • 10mm hexagonal shanks for a secure grip
  • Chamfer features a solid tungsten carbide cutter



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Warranty & Returns

Non-TSO brand products are covered by the warranty of their respective manufacturer.
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23 Reviews

  • 5
    Bench dogs

    Posted by Rodney Borne on 9th May 2024

    I would be glad to review your products I just purchased, the only reason I can’t is because I just had rotator cuff surgery on the shoulder. This healing process could be 9 months. I was impressed with your products and I purchased those for a future project once my shoulder has healed.

  • 5
    Great Product

    Posted by ERNEST on 9th May 2024

    This a a perfect item to clean and chamfer 20mm dog holes.

  • 3
    chamfer / reamer

    Posted by nick on 6th Apr 2024

    i wouldn't recommend this unless you are specifically trying to widen or clean glue out of a dog hole - i used it on a new mft benchtop to chamfer the drilled holes and it was easy to accidentally widen the holes just enough to make 20mm dogs wobble slightly. if all you're after is chamfering a new set of holes i'd just use a router, that worked much better for me.

  • 5
    Worked excellent on my mft table

    Posted by Tom Schaffer on 2nd Apr 2024

    I have hand twist version. This new one is so much easier to use.

  • 4
    UJK reamer/chamfer tool

    Posted by James Hauenstein on 26th Jan 2024

    I like the reamer portion, but the chamfer portion caused a lot of chip-out of the birch plywood I used on this project. I ended using my trim router with a 44 degree chamfer bit to do the chamfering of my 20mm dog holes and then followed up with the reamer tool. This gave much more acceptable results. This issue may be material dependent.

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