How do you use metal dry wall anchors?

Answer 1

There are the drywall screw anchors that just look like a giant screw, they just screw in with a Philips and then the correct size screw fits into the same place as the screw driver.

Blue (and other colours) plastic anchors you punch a hole in the drywall then push in the plastic insert until the little flange touches, then the screw goes into the center hole to expand for grip in the wall (these are good for low strength hold in other materials)

Finally there are toggle bolts, they go through a pre drilled hole and the little wings pop out and the screw gets tightened until the wings clamp down from the far side of the drywall.

All use a screw to either hold things up or clamp a hook or similar to the wall.

Answer 2

That depends on the anchor. The easiest type are the screw in types like the ez anchor, zip it and wall dog.