Everything needed for higher-math classes—this precision instrument set is ideal for serious high-school and college students. Includes a standard/metric ruler, 180° protractor, 60° set square, 45° set square, safety-point scribe compass, loose-leg wing divider, woodcase pencil, pencil sharpener, block eraser and lettering guide. Handy metal storage case features imprinted conversion tables and geometric theorems.