For your consideration, here is an OOK Valu-Pak Professional Picture Hangers Set of 34 Pieces, no. 50918, New and Sealed, with nails, from The Hillman Group, made in China.  There are instructions on the back of the package.  It will be mailed in a box for protection.  Item pictured is the actual item up for sale and comes from a non-smoking household.  (498.811d-.8bx2)

Here are the quantities and weight limits:

4 - 5 to 10 lbs.
3 - 20 lbs.
3 - 30 lbs.
1 - 50 lbs.
1 - 100 lbs.