10PK 1/4-20 BB Anchor Save when you buy the 2 pack! Toggle anchor installs behind 3/8"- to 3-5/8"-thick hollow materials to provide a secure hold Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation Made in USA, and includes 1/4"-20 UNC-threaded bolts Strength is 265 lb. in 1/2" drywall and 1,080 lb. in concrete block with a 1/4"-20 UNC bolt