Check the listing for details. Impact Triple Square Spline Bit Socket M17 Bit 1/2" Drive Metric Screwdriver. Condition: New. Listed at 20.64 USD. Attributes:* Driver Size: 1/2-inch* Bit Size: M17* Total Length: 78mm / 3.07-inch* Bit Length: 55mm / 2.15-inch* Material: Chrome Molybdenum Steel (CR-MO)* Finish: PhosphatingWhat Is Included:* 1 Pieces x Triple Square Bit SocketApplications & Features:--- Impact Triple Square Spline Bit Socket is crafted from strong Chrome Molybdenum (CR-MO) Steel. After heat treatment and forging, it has high hardness and good toughness.--- The hex bit socket features laser-etched size markings that are easy to read even in low light, making it easy to find the right socket.--- The black phosphate finish protects the hex bit key socket from rust and corrosion, absorbs and retains oil, and repelling moisture.--- The independent pin-hole base design adds extra security and works with a pin and O-ring system to ensure secure retention of the socket.