3D printable 3 jaw chuck. Made it for my laser rotary attachment. 

Easy to assemble.

Hardware needed:

5x m3x25mm internal hex bolts

5x m3 nuts

There are little dots on sides of jaw holders and on the front plate. Jaw holder with 1 dot will go to the slot with 1 dot and so on.

Jaws are removable and can be customized to hold special shaped objects.

Back plate has circular pattern of 6 bolts for attachment. Diameter 60mm.