Wil Strijbos – «Aluminum Concave/Convex/T Dovetail»

Wil Strijbos Aluminum Concave Convex Dovetail T Puzzles
Name:Aluminum Concave/Convex/T Dovetail
Brand:Wil Strijbos
Level (Complexity):Concave and Convex — Hard (5)
T Dovetail — Complex (6)
Type:Metal Puzzle
Object:Disassemble the puzzle
Estimated time:30-60 minutes
Number of parts:2
Size:5x3.5x2 cm / 2x1.4x0.8 in
Packaging:Cardboard box
Materials used:anodized aluminum
Safety:Small parts, choking hazard

Visual Description

Dovetail Concave, Convex and T are a set of small aluminum puzzles by Wil Strijbos. This is not the only set of Dovetail puzzle from Wil so make sure not to confuse this one with Dovetail Cubes — these are different, but also quite great.

All 3 puzzles have minor differences, but similar mechanics inside. I have found Concave and Convex to be slightly easier than T.

Puzzles look like a small aluminum rectangle with a different pattern on the top:

  • Concave has a line that narrows a bit in the middle.
  • Convex has a line that broadens in the middle
  • And T — no surprise — has a “T” looking shape on the top side.

All puzzles are made in nice-looking metallic white and fresh green colors and match together in a great way.

Despite their small size you will definitely feel a great deal of weight (every puzzle is around 100 grams) that actually adds to a great aesthetic feel.

More to that, puzzles are quite durable and will not break, scratch, or damage easily which is a great advantage.

Main Features

The mechanism of these Dovetail puzzles is quite similar. Consequently, all three puzzles are solved in a pretty similar way. T might be a bit harder to solve due to a different pattern, but I guess the point of the T is to confuse and detract the puzzler — which is certainly an amazing move.

Nevertheless, I have found this particular puzzle set to be quite repetitive, and comparing to Dovetail Cubes — it lacks the diversity of solutions.

Nevertheless, the quality fo all three puzzles amazed me and I have spent a quality time solving all three pieces.

Aluminum Convex Dovetail Metal Puzzle by Wil Strijbos
Aluminum Dovetail T Metal Puzzle by Wil Strijbos
Aluminum Concave Dovetail Metal Puzzle by Wil Strijbos


It is obviously a great piece that every Wil Strijbos fan needs to have in their collections. As for the complexity — it is not that great as Dovetail Cubes, so I would prefer the latter in the first place, but we have to understand that Wil’s puzzles are quite rare, so If you have a chance to grab Concave, Convex, T or all three at the same time — I would do it.

A great gift for a puzzle lover as well, they will definitely enjoy the quality and the solution process.

Where to buy

Check prices for Wil Strijbos Concave Dovetail

Check prices for Wil Strijbos Convex Dovetail

Check prices for Wil Strijbos Dovetail T

Assembly Tips

  • All 3 models can be solved easily by smacking them on the palm of the hand or a table.
  • T model is basically solved the same way but you need to squeeze the narrow sides of the puzzle (push the green part in the white part) and smack it on the palm to open.
  • Wil Strijbos Aluminum Concave/Convex/T Dovetail Puzzles solution video can be found below

Important Notes


  • Detailed answers on Frequently Asked Questions about Wil Strijbos puzzles you can find here.
  • If you still have questions, ask them in the comments. We will answer in detail and include them in the FAQ list.

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Nick Shvirst
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