Only four inches long, the Uni-Wrench has wild torque transfer with 6 point sockets precision cast: + / - 0.001"; in tool steel.
Superb balance makes the Uni-Wrench a joy to use: very useful on bicycles, motorcycles, automobiles, etc.; the single best addition to any tool box or drawer.
The relevant US Patent for the Uni-Wrench was the first gained, pro se, by Peter Gibson (below).