Metallic and Avanti screw, Inc., prime American manufacturers of fastener products, have always worked to present the latest in fastener technology to our distributors and their contractors/users. Hex washer head fasteners have historically only offered three drives the hex, Phillips® and the slot. In 1999, we introduced in the "QuaDrive" in square, hex, slotted and Phillips®, in fourteen of the most popular sizes of sheet metal screws.