My collet collection was getting out of hand and I couldn't find a suitable (Gridfinity) based organiser that suited my needs.

Features of this are:

- Gridfinity based (2x4)
- It's not stackable... I wish it were, but I played with various ideas and it was just too difficult to get the things out with tall outer walls
- ER16
- tapered walls (so collet fits snugly)
- straight rows to allow organisation by size (row of 3mm, row of 4mm, etc) 
- half "gridfinity height". 

I printed mine using PETG as it seems coolant proof (although I would in general carefully clean collets before stacking). Fit is decently tight on a range of collets (amazingly not all collets are the same size...)

Gridfinity ER16 collet holder

My collet collection was getting out of hand and I couldn't find a suitable (Gridfinity) based organiser that suited my needs.

Features of this are:

- Gridfinity based (2x4)
- It's not stackable... I wish it were, but I played with various ideas and it was just too difficult to get the things out with tall outer walls
- ER25
- tapered walls (so collet fits snugly)
- straight rows to allow organisation by size (row of 8mm, row of 10mm, etc)
- half "gridfinity height". Simply because this height works for the ER16 version and I wanted the two to be mostly identical.

I printed mine using PETG as it seems coolant proof (although I would in general carefully clean collets before stacking). Fit is decently tight on a range of collets (amazingly not all ER25 are the same size...)

Gridfinity ER25 collet holder

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Gridfinity ER16 collet holder

Gridfinity ER25 collet holder