This Staedtler Maths Set contains 8 pieces to help you draw perfect circles, squares and other shapes. A pencil, eraser and sharpener are included, so you'll have everything you need for technical drawing. There are 8 pieces in this set, including a Staedtler 550 55 compass, sharpener, eraser, pencil, 45/90 degree set square, 30/60 degree set square, 15 cm ruler and a 180-degree protractor.