Starrett 12'' Combination Square, with Square Head

Laroy Starrett invented the combination square in 1877 and it has become a basic tool for every craftsman and builder.  The C11H series has a cast iron head with a handy spirit level and a hardened scriber.  The blade is machine divided, hardened and tempered with a reversible lock bolt that allows the blade to be turned over or end-for-end without removing the lock bolt or nut.  This assures true alignment of the blade and head.