Multifunctional drawing implement box

A drawing implement box comprising:

• a first ruler section comprising:
• a first ruler plate which extends in a horizontal direction and has a first scale of lengths on a first lateral side thereof and a substantially semi-cylindrical first member projecting upwardly from a second lateral side thereof, the first member having a first disc extending from a first end thereof and a compartment defined therein, the first disc having a first recess in an underside thereof and a first vertical central hole;
• a second ruler section comprising:
• a second ruler plate which extends in a horizontal direction and has a second scale of lengths on a first lateral side thereof and a substantially semi-cylindrical second member projecting upwardly from a second lateral side thereof, the second member having a second disc extending from a first end thereof and a compartment defined therein, the second disc and being disposed below the first disc, the second disc having a third scale of angles on a circumference thereof, a boss which is formed on an upper side thereof and rotatably received in the first recess in the first disc, and a second recess in an underside thereof;
• and
• a positioning means comprising:
• a bolt which passes through the first and second discs and having a bolt head received in the second recess in the second disc and a threaded longitudinal through hole having upper and lower ends;
• a nut mounted around the bolt above the first disc for retaining the first and second discs together yet allowing relative rotational movements therebetween;
• a first screw mounted to the lower end of the threaded longitudinal through hole of the bolt;
• and
• a second screw mounted to the upper end of the threaded longitudinal through hole of the bolt and contacting with the first screw for restraining rotational movement of the bolt.