Compass with unique "arm-lock" mechanism Die-casted, centering compass cum divider Foldable 30cm scale with "auto press-lock" This box contents : 1 compass, 1 divider arm, 1 set square 45 degree, 1 set square 60 degree, 1 foldable scale (30cm), 1 protractor 180 degree, 1 pencil, 1 eraser, 1 sharpener, 1 (0.5mm) mechanical pencil, 1 lead box with 10 leads