PEC Tools 7122-012 4R Combination Square 12" 3 Piece Set (no protractor head), reads 32nds, 64ths, 8ths, 16ths. Heads: Square Head, Center Head. (2 heads and blade) Length: 12" 4R Graduations: 32nds, 64ths, 8ths, 16ths. Protractor head is NOT included