Flex Shaft: Flexes to 90 degree, it can be bent, shell and soft rod separation. The shaft rotates only inside, and any point outside is not rotated. It can protect your fingers when you hold it to use. Extend The Area of Bits: Perfect for tight places which is hard to reach screws, professional deal with ordinary screwdriver can not reach the corners and stenosis Double Lock Design: tube and there is a ball lock inside, securely holds the bits in place, reduces the possibility of wobble or fall out, ensures the accuracy of your power drill or other devices 1PC Flexible Drill Bit Holder: 12 inches (326 mm) Hexagon handle (1/4 handle), 6.35 mm (1/4Inch) screwdriver head, High hardness, rugged, clear angle, easy to loose Flexible Drill Bit Extension bit holder Color:As Shown Material:High-Carbon Steel Package Contents: 1 * drill bit extension