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The screw length includes the head on flat head, aka countersunk, screws. One anchor can hold up to 238lbs in 1/2" drywall or over 800lbs in concrete block. Far superior to plastic wall inserts and the old fashioned spring wing toggle bolts.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.