Ideal for students, mathematical set features 10 basic math tools: a metal 4" compass that makes circles up to 8" in diameter; wood-cased pencil for use with compass; metal 3-1/2" dividers; clear, 4", 45/45/90-degree triangle graduated in Imperial and metric; clear 5" 30/60/90-degree triangle graduated in Imperial and metric; Imperial/metric clear plastic ruler that measures up to 6" (15cm); clear 4" plastic semicircular protractor; white pencil eraser; plastic handheld pencil sharpener with metal blade. All are neatly packed in an 8" x 3" x 3/4" tin that easily fits in your pocket, backpack or pencil box.