Tool having rotatable driving head

A tool comprising:

• a handle including a first end having a pair of flanges for defining a notch between said flanges, said handle including a longitudinal orifice and a lateral aperture intersecting with said orifice,
• a driving head rotatable secured to said flanges of said handle at a pivot shaft, said driving head including a Plurality of teeth engaged in said notch of said handle,
• a pawl including at least one tooth for engaging with said teeth of said driving head and including a rod extended downward from said pawl for slidably engaging with said orifice of said handle, and
• means for moving said rod of said pawl to slide along said orifice of said handle and to force said at least one tooth of said pawl to engage with said teeth of said driving head,
• said driving head being secured in a selected angular position relative to said handle when said at least one tooth of said pawl is forced to engage with said teeth of said driving head,
• said moving means including a button having a stem slidably engaged in said aperture of said handle, said rod of said pawl being engaged with said stem for preventing said stem of said button from being disengaged from said handle, and means for biasing said stem to engage with said rod of said pawl and to force said at least one tooth of said pawl to engage with said teeth of said driving head.