Engineered performance. 8 x 2 Inches. Drill Bit included. Patented design requires no pre-drilling; Ideal for interior wood construction and projects; Not recommended for exterior projects or treated lumber; Gold color complements most wood finishes. No strip T-20 star drive. Countersinking blades. No split twist shank. No pre-drill bore-fast thread. www.hillmangroup.com. See www.hillmangroup.com for product information. For information product patents visit www.hillmangroup.com. Made in Taiwan.