Universal self-adjusting wrench

An open wrench comprising:

• a handle portion;
• a head portion coextensively connected with the handle portion and including
• opposing flat surface faces,
• first and second jaw portions defining a substantially arcuate crescent interior,
• a slot formed in said first jaw portion, said slot having a screw hole formed at a base end thereof through said head portion for access from an external peripheral surface of said head portion,
• a block member slidably received within said slot, said block member having a base end and an exposed end, the exposed end protruding into an open area defined by said first and second jaw portions, and a threaded hole formed in the base of the block member,
• a coiled spring positioned between a base end of said block member and the base end of said slot, and
• a screw having a shank, a threaded tip at one end of the shank and a head end at the opposite end of the shank;
• a securing bracket for preventing displacement of said block member from said slot,
• wherein said block member is secured within said slot upon screwing the threaded tip of said screw into the base end of said block, the shank of said screw receiving said coiled spring, and upon securement of said securing bracket against the opposite flat faces of said wrench head, said block member being selectively adjustable within said slot upon compression of the exposed end of said block.