mr. pen- professional compass for geometry, extra lead, metal compass, compass, compass drawing tool, drawing compass, drafting compass, compass for students, compass for woodworking, compass geometry mr. pen mr. pen bow compass 4 inch 1 high quality professional compass/divider for math, geometry, art, drafting and drawing, creates circles up to 8 inches in diameter precision geometry compass with spring bow head and center wheel prevents unintentional leg movements all metal, nickel plating compass, lifelong satisfaction guaranteed easy to adjust legs, great for precise drawings a professional choice