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Not being free the hands movement in turning old adjustable and pressure wrenches which imposes force on humans wrist is the reason for developing Lway idea . Facility and simplicity in working with Lway and turning it due to changes made in wrenchs form has caused the acceleration of the work and also its ergonomic form resulted in destination between
Lway and ordinary wrenches.
Milad Mohajeri & Alireza Haji Dehabadi