25-Count 1/4-in x 2.75-in Blue Steel Self-Tapping Concrete Screw The i?original masonryi? anchor that cuts it's own threads into concrete, brick, or block Easy to installi?drill a hole, drive an anchor Hi-Loi? serrated thread design adds strength and reduces required installation torque Climaseali? coating provides extra corrosion resistance Reversible and removable Building code approved For anchoring into concrete, brick and block 1 masonry drill bit included in every pack Buildex 25-Count 1/4-in x 2.75-in Blue Steel Self-Tapping Concrete Screw