Speed wrench

Alternate name for "ratcheting box wrench."

The 5/8" x 3/4" size is an "almost as good" alternative to the Lightspeed wrench, at a significantly lower cost. Used on a standard lighting C-Clamp, the 5/8" fits the 1/2" square-headed pipe bolt, and the 3/4" fits the yoke bolt.

Craftsman 5/8 x 3/4 in. Wrench, Ratcheting Box - Model 42164 at Sears.com