GRK Fasteners Caliburn 3-1/2 in. L Star Bugle Head Self Tapping Concrete Screws

Caliburn Concrete screws are professionally engineered fasteners with a patented thread design for ease of driving the screw in concrete and similar applications. Available in three different head designs for multiple applications. Caliburn, Caliburn PH and Caliburn XL are Climatek coated for high corrosion resistance. Caliburns uncompromised draw and pullout strength make it possible to be used in jobs which previously required an anchor. The screws aggressive thread design afford it the ability to be removed and reinserted into the same pilot hole numerous times - without the concern of the fastener breaking or the threads wearing.