Toggler Snapptoggle BA Toggle Anchor with Bolts, Zinc-Plated Steel Channel, Made in US, 3/8" to 3-5/8" Grip Range, For 3/16"-24 UNC Fastener Size (2 Packs of 10) Save when you buy the 2 pack! Toggle anchor installs behind 3/8"- to 3-5/8"-thick hollow materials including gypsum board, drywall, and concrete block to provide a secure hold from within the mounting material Anchor affixes to the wall before adding the bolt and fixture, allowing one-person installation and fixture changes Made in USA, and includes 3/16"-24 UNC-threaded bolts Ultimate tensile strength is 238 lb. in 1/2" drywall and 802 lb. in concrete block with a 3/16"-24 UNC bolt