Wright-brand ratcheting wrench that allows the user to “open” the wrench so it can be used on nuts or bolts positioned where a traditional wrench can’t be used
Long bolts used in chain or belt tensioners, or bolts/nuts in tight spaces often defy speedy removal or installation using conventional ratchet wrenches or box-end wrenches. Wright Tools offers ratcheting box-end wrenches that allow the user to “open” the wrench to get it on the fastener, then “close” the wrench so it can be used to ratchet the fastener on or off.
— Dan Anderson