The Joker’s clever double-hex geometry makes for a positive connection with nuts or bolts – it’s a perfect fit. And the exchangeable, hardened metal plate in the Joker’s mouth literally bites itself into the bolt with its extremely hard tips. Both aspects prevent any unpleasant slipping, even at higher torque.
Less can be more. Particularly in those very confined spaces where conventional wrenches with a 60° return angle have to be turned umpteen times to tighten and loosen nuts or bolts. Instead of a 60°, the Joker only has a 30° return angle with a double-hex design. This and the Joker’s straight head mean that any turning of the wrench has become a thing of the past.