How To Insert Plastic Wall Anchors. Whether you're using a plastic wall anchor, a molly bolt or any other type of wall anchor, you'll need to drill a hole in the wall, and the size of the hole is critical to the proper functioning of the anchor. These make use of a spring action to the prongs are then pressed tightly against the inside of the wall by driving the included screw.
Some masonry anchors use a plastic shield, as shown in the preceding page, while others use an anchor.
Learn about all the major types of wall anchors, how to use them, and how to install them in wallboard, plaster, or even masonry. For light objects, the simple plastic inserts can be great. Each half of an interlocking pair is identical, so there's no need to keep track of which half goes on the wall or cabinet. Small plastic wall anchors are suitable for items under 10 lbs., while the largest anchors can hold up to 30 lbs.