The DEWALT DW1587 6 Bit 3/8-Inch to 1-Inch Spade Drill Bit Assortment includes six commonly used high-performance drill bits to complement your tool set. The set features the Max Life corner that preserves nail life, the Extreme Speed Channel for efficient chip removal, and a 1/4-inch ball groove shank for quick bit changes. DEWALT spade bits are designed with heavy-duty shanks for extended life and durability.