Toggle bolt

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various opened and closed toggle bolts

A toggle bolt, also known as a butterfly anchor, is a fastener for hanging things on hollow walls such as drywall.

Toggle bolts have wings that open inside a hollow wall, bracing against it to hold the fastener securely.[1]

The wings are much larger than the bolt they are attached to. This spreads the weight of the secured item over a larger area, increasing the weight that can be secured compared to a regular bolt.


  1. ^ New Fix-it yourself manual, Reader's Digest, ISBN 0-89577-871-8