9 x 2-1/2 inch. Premium. Engineered performance. Patented design requires no pre-drilling. Use for decking and all exterior wood projects. Recommended for use with treated lumber. Bronze color complements most wood finishes. No strip T-25 star drive. Countersinking blades. No split twist shank. No pre-drill Bore-fast thread. Limited lifetime guarantee. www.hillmangroup.com. See www.hillmangroup.com for product information. For information on product patents visit www.hillmangroup.com. Made in Taiwan.