Bayco Inc. carries an assortment of QuikDrive screws including the exclusive Banana Clip style, available only from QuikDrive, curves away from the surface to help prevent scratches and tears. Head Type: Trim Head with Nibs. Drive: 2 Square. Thread Type: Coarse. Length: 2-1/2 inch. Screw Diameter: 7. Shank Finish: Stainless Steel.