Strap Toggle Bolt Drywall Anchors WITH 1/4 x 2-1/2" Screws - RCG Designs - Stuff for the DIY Guy.
Amazon.com: TOGGLER SNAPTOGGLE Drywall Anchor with Included Bolts for 1/4-20 Fastener Size; Holds up to 265 pounds Each in 1/2-in Drywall by TOGGLER (20 Pack) : Industrial & Scientific
Lot 5 Pieces Toggler 3/16" Snaptoggle® BB Toggle Wing with Screws Flat TV Mount | eBay