Patent ID: 8056449
Filing Date: 2011-11-15
Classification: B25B

Abstract:
1. A wrenching tool applicable to various sizes of threaded members, the wrenching tool comprising: a body having a polygonal fitting hole formed of a first equilateral polygonal hole having multiple first internal angles and a second equilateral polygonal hole with the same configuration having multiple second internal angles, the two polygonal holes being concentrically arranged with an angular displacement to provide two fitting positions; the first polygonal hole of the fitting hole having a size larger than that of the second polygonal hole; the first internal angles each having a first side and a second side; and a first small internal angle of multiple first small internal angles is disposed on the first side of each the first internal angle, each first small internal angle of the multiple first small internal angles is spaced apart from opposing ends of the corresponding first side of each the first internal angle, the first small internal angles forming a third polygonal hole and providing another fitting position with a size smaller than that of the first polygonal hole; wherein the first polygonal hole, the second polygonal hole and the third polygonal hole have an equal number of sides.