Feature:1. This drill bit extension is made from quality high carbon steel material, which is sturdy and durable.2. With accurate finish and fine polishing, this drill bit extension can provide you with better use experience.3. The hex shank dynamic trough design can reduce the skid, which is more stable and efficient.4. With 1/4 inch hex shank, this drill bit extension easy to install, giving you more convenience.5. Wide application, this drill bit extension is suitable for 1/4" spade drill, screw bits and auger bits.Specification:Item Type: Drill Bit ExtensionMaterial: High Carbon SteelHex Handle Specifications: 1/4inSize: Approx. 150mm / 5.9in, 300mm / 11.81inPurpose: It Can Be Connected with 1/4 Shank Spade Drills, Auger Drill, Screw BitsApplicable Scenarios: Mechanical Engineering, Mechanical Equipment, Woodworking.Package List:2 xDrill Bit Extension2 x Hex Shank