The new Proto ratcheting wrench, designed with a unique I-beam profile and offset open-end provides comfort and helps increase your swing by up to 13 degrees. Saving you hours of work and reducing downtime, our industrial strength tool is quite possibly the fastest ratcheting wrench on the market.

http://www.stanleyproto.com/xhtml/LITERATURE/PMKT-1013_MIUSARatchetingWrenchKFS.pdf