Modeling Meat Grinder in Maya
Step 25
Add edge again.

Step 26
Select face.

Step 27
Extrude face that was selected in previous step to look like on picture bellow.

Step 28
Extrude again.

Step 29
And extrude again.

Add edge again.

Select face.

Extrude face that was selected in previous step to look like on picture bellow.

Extrude again.

And extrude again.
