The De Neers - C 1x5/8 A, 3/4 Square Drive Hexagon, and Bi Hexagon Socket have a commonly used socket size. The Square Drive Hexagon and Bi Hexagon Socket is the best choice for tight spaces. It quickly fixes around a hexagonal bolt and nut head, so you can quickly tighten or loosen it. A bi Hexagon is a twelve-point socket with twelve angles in the bolt end. This Hexagon and Bi Hexagon Socket is also known as a “double hex.” The 3/4 Square Drive Hexagon and Bi Hexagon Socket can fit in hexagonal bolts in twelve different positions.
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