This is a 1x1x40 with 4 subdevisions I made for Alexandre Chappel's 55mm storage grid system.

The Collet holder is based on the 40mm stackable model and can be used on top of a 1x1 sized 40mm box. This model is designed to contain more different items in a smaller space.

Please check out Alexandre chappel's grid system: https://www.alch.shop/shop/assortment