Feature:1. High Quality Stainless Steel: The drill bit is made of accuracy ground high quality stainless steel. Each piece is treated with rust proof satin appearance, which is high in hardness and durable.2. High Compatibility: The drill bit is compatible with small wrenches, cordless screwdrivers, low speed DC hand drills, and is mainly used for screwdrivers in small spaces such as computer cases and electrical cabinets.3. Flexible Drill: The drill can be bent, twisted and rotated at many different angles, can touch a small place, and work flexibly in various gaps, rather than by hand.4. Rotating Inner Shaft: The inner shaft of the drill has a wide range of rotation and stable quality. When the shaft rotates inside, the flexible black sleeve protects your hands from injury and does your job perfectly.5. Wide Variety: A wide variety of drill tool sets can meet various requirements and can provide ideal solutions, including easy removal, disassembly and reinstallation of awkward automobile nuts, bolts and screws.Specification:Item Type: Drill ExtensionMaterial: Stainless SteelScrewdriver Head Model: Flat 4, Flat 5, Flat 6, PH0, PH1, PH2, PH3, T15, T20, T25Flexible Shaft Length: Approx. 300mm / 11.8inShort Turn: Hole Depth Approx. 12.5mm / 0.5inColour Straight Shank Hex Shank to Square Head Post: Model Width of Square Head (Approx.)Width of Six Sides (Approx.)Total Length (Approx.)1/4 (65mm)6.35mm/0.3in6.35mm/0.3in65mm/2.6in3/8 (65mm) 9.5mm/0.4in6.35mm/0.3in65mm/2.6in1/2 (73mm) 12.7mm/0.5in6.35mm/0.3in73mm/3inQuick Release Self Locking Post: Length 60mm, 100mm, 150mm, Hex Handle Diameter 1/4in, Hex Hole Diameter 1/4inUniversal Sleeve: Square Caliber Approx. 9.5mm / 0.4inStraight Shank Hex Rod to Square Head Rod: The width of the square head is 9.5mm, and the width of the six sides is 6.35mm