Cobra claims that their Triple Grip anchors — with dual claws, a split core, and locking wings — can hold a maximum pull load of 70 pounds in 5/8” drywall or a whopping 275 pounds in concrete. These aren’t your ordinary everyday plastic anchors.
Built for use in drywall, solid or hollow brick, and cinder blocks, Triple Grips can also withstand vertical shear loads of 115 pounds in drywall or 500 pounds in concrete. These load ratings kick the crap out of ordinary plastic anchors — but not without a catch: they’re thicker and require larger pre-drill holes.
So far I’ve only seen these anchors at larger Lowes stores, and Cobra’s website is “under construction.” But after using them to install some shelving, I’d say Triple Grips really hold up to the competition. Prices are slightly higher than for generic plastic anchors, and start at about 8 cents apiece, assuming you buy the bulk pack. In medium and large package quantities, Cobra throws in matching screws and a masonry bit.
Cobra Anchors (Corporate Site, “Under Construction”)