Right angle combination square

A combination square comprising:

• a blade;
• a head on which said blade is received, said head having a first fence extending generally perpendicular to said blade and a second fence extending at an angle relative to said blade, said head being divided into a first portion and a second portion pivotally joined to each other about an axis, wherein said head includes a first pivot assembly at said first fence and a second pivot assembly adjacent said second fence and interiorly thereof;
• said first pivot assembly including a first tab extending downwardly from a first portion of said head and a second tab extending upwardly from a second portion of said head such that said tabs overlap each other and define a bore that extends through both of said tabs along said axis, and a pin received within said bore;
• and wherein said second pivot assembly includes a tab extending downwardly from said first portion and a sleeve formed on said second portion coaxially located with said tab, said sleeve and said tab defining a bore along said axis, said sleeve having a recess of a larger dimension than said bore at one end defining a shoulder, a fastener having an enlarged end at one end and a threaded end at the opposite end insertably received within said bore, wherein said enlarged head portion of said fastener resides within said recess and is engagable with said shoulder to limit axial movement of said fastener, and a thumb screw threadably mounted on said threaded end of said fastener and rotatable thereon to selectively lock said second portion of said head in a selected position relative to said axis.