Flashlight, torch holder, table light

I needed a table light and I realized, that those powerful flashlights are very cheap and the light is great. So I made this holder. Diameter torch, around 28 - 32mm.

You need:
1x Alu tube, outer diameter 15mm, the top cap is for 13mm inner diameter, length up to you
3x hex bolt, M4x20 (16-25mm)
3x knurled nut