Daniel Prince wrote:
I like to use ribbed plastic screw anchors to hold screws in drywall
for light duty use. My problem is that they never come with ANY
instructions so I always have to guess what size of drill to use and
what size of screw anchor to use.

If you're always putting the anchors in drywall forget about the
drilling operation and use self-drilling anchors. Much faster, one
less operation, and they hold well.

http://www.simpsonanchors.com/catalo...all/index.html

Any hardware store or home center will have them.

R