If it is already a component or group first you have to: Explode it, OR Double click the item to edit it THEN you can draw the circle to push/pull it. If you just erase the circle all you do is have a hole in the face of the item. If you want it so that there is a face on the inside of the item then you need to push/pull it. Have a look at the demo model. circle-demo.skp

@gaieus said: No, Remus' solution is easier: draw a triangle offset it simply move the inner triangle up (or down) The side faces will be created automatically (by the autofold feature). Ahh ha ha ha... I missed his offset reply because I went to try the the scaling solution.