The STAEDTLER Mars Comfort Precision Compass Set will have you drawing circles fast. This quick-setting compass features a push-button leg adjustment mechanism, a centre wheel for finer adjustments, hinged legs, an interchangeable lead part with a 4 mm diameter shank, and an interchangeable needle. It measures 17 cm in length, and the maximum drawn circle is approximately 35 cm in diameter. This set also contains a universal adapter so you can use it with pens or pencils, and a box of spare leads and needles. Comes in a plastic case with hinged lid.