Durable thick copper multifunctional tool as ruler and bookmark in Stationery Supplies. Pure brass punching, wire drawing and hand polishing to make beautiful metallic material sense from inside out. No plating on the surface, to retain the original texture of brass. You can measure mm cm inch and angle,It can meet the usual small measurements. Due to strong durability,It can be used for any occasion, such as life, study, work, experiment, etc.