end 14 of the base member 12 a set pin 40 is provided to be disposed through an elongated opening 42 formed in the first end 30 of the arm member 28 and be secured to the first end 14 of the base member 12 the set pin 40 assists in the alignment of the arm member 28 with respect to the base member 12 and further limits the pivoting range of motion between the two structures a bolt member 44 is preferably provided to be disposed through an opening 46 formed in the arm member 28 and into the elongated opening 48 formed within the first end portion 14 of the base member 12 the bolt member 44 is releasably engaged by a receiving member 50 disposed within the elongated opening 48 accordingly tensioning of the bolt member 44 with respect to the receiving member 50 tightens the frictional engagement between the disc shaped first end 14 of the base member 12 with the collar portion 38 to secure the position of the arm member 28 with respect to the base member 12 the tool 10 depicted in fig1 2 a 2 b 5 6 a and 6 b is shown having a first engagement face 22 and second engagement face 24 that are set in a 90 u00b0 position with respect to one another.