Engineered performance. 9 x 2-1/2 Inches. 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-25 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 on product patents visit www.hillmangroup.com. Made in Taiwan.