Description: Premium Material: This woodworking compass is made of solid aluminum alloy, the finish is smooth, and it is more comfortable to use. Not easy to rust or break, corrosion resistant and durable. The extended circle drawing tool makes your operation more convenient, is a good helper for your work. Clearly-Mark: Circle marking tool is very delicate, adopts the laser-engraved markings, metric/inch are tender and clear identification, easy to read and measure. They won't smudge, fade, or disappear, with a size of 6.45*1.18*0.55inch.