Also known as caulk-inanchors,these stay secure whenthere'snot much material tohold.Wheninstalled,the cone expands the sleeve to hold it firmly inside thehole.Toinstall,insert the anchor cone end first and use an installation tool to drive the sleeve over thecone.Then,insert a screw or threaded rod andtighten.Pull-out strength and shear strength values are25%of the ultimatevalues.