Check the listing for details. 7mm HSS Twist Drill Bits 300mm Length For Drilling Extra Long Drill Bit. Condition: New. Listed at 14.09 USD. Drill BitsWhy Choose This:★Specification: Drill Bit Diameter: 7mm / 0.28-inch; Flute Length: 175mm / 6.89-inch; Shank Diameter: 7mm / 0.28-inch; Total Length: 300mm / 11.81-inch; 1 x Lengthened Drill Bits★Twisted Design: Split point tip and twist design increases cutting speed while easily self-centering to prevent movement. The twisted design of the drill bit quickly removes drilled chips, then leaving a smooth hole.★Extended Drill：The jobber extended drill is suitable for a wide range of applications, allowing you to access hard-to-reach areas where ordinary drills cannot. High hardness, sharp twist drill bits will make drilling easier and more efficient.★High Speed Steel: Made of high-speed steel, with high hardness, heat resistance, wear resistance, durability and long service life.