DEWALT Drill Bit, Spade, 1/2 Inch x 16 Inch (DW1591) Product Description Professional contractors rely on DEWALT Spade Bits when they need to quickly bore clean holes for electrical, plumbing, framing and more. Featuring a heavy-duty, heat-treated shank for protection against bends and breaks, DEWALT Spade Bits are equipped with an optimized cutting groove which provides fast chip removal, and a OE? ball groove shank offer easy quick changes in impact drivers. Chamfered corners boost durability especially against nail impacts. Available in sizes ranging from 1/4 in. to 1-3/8 in. Dia, available lengths 6" and 16". From the Manufacturer DEWALT DW1591 1/2-Inch by 16-Inch Spade Drill Bit Features Heavy-duty, heat-treated shank for protection against bends and breaks Optimized cutting groove for fast chip removal Chamfered corners for durability against nail impacts Paddle hole for easy wire pulling and bit storage 1/4" Ball groove shank allows for quick bit changes USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.