Bosch BL2755 7/16" Black Oxide SP 12" Long (Carded)Bosch Power Tools and Accessories is one of the divisions within the Robert Bosch Tool Corporation, which is one of the largest power tool and accessory manufacturers in the world. Bosch provides a complete line of corded and cordless power tools and accessories engineered to survive any jobsite and allow professionals to take control of their work.Bosch BL2755 7/16" Black Oxide SP 12" Long (Carded) Features:; Bosch black oxide bits offer superior durability, speed and selection for most general purpose applications. Best for cutting holes into metal and work equally well in wood and plastic drilling. Use in steel, copper, aluminum, brass, oak, maple, MDF, pine, PVC, polycarbonate, acrylic, ABS, nylon and composite materials.; Extra Length (Aircraft) Black Oxide Drill Bits ; Item # BL2755; Diameter 7/16 ; Shank Diameter 7/16 ; Overall Length 12