These Tapcon screw anchors have a Phillips head drive and are for exterior insulation systems and masonry. The anchor is 1 3/4 x 1/4 inches and the drill bit is 3 1/2 x 3/16 inches. These screws have a one-inch minimum embedment and a 1 3/4-inch maximum work thickness, with an ultimate shear of 620 to 1,000 pounds and an ultimate tension of 250 to 500 pounds. These anchors come in a box of 100.