The Staedtler 550 Maths Set contains 8 pieces to help you draw perfect circles, squares and other shapes | With a pencil, eraser and sharpener included, you'll have everything you need for technical drawing | Contains a precision metal compass with blunt safety needle and integral universal adapter, Sharpener, Eraser, Pencil, 45/90 degree set square, 30/60 degree set square, 150mm ruler and 180 degree protractor | Quality components | Packed in sturdy metal storage case