Troika Construction Endless HB Pencil Erasable, Unbreakable, Replaceable Tip Troika redefines pencil technology with the HB Construction Endless Pencil. This Pencil requires no more sharpening and there is no need to worry about broken leads. The Troika Construction Endless Pencil features a permanent and endless HB writing tip for up to 12.5 Miles (20 km) of written word. The HB hardness tip is replaceable, erasable and unbreakable. Each Troika Endless pencil has a six sided aluminum barrel with the Troika CONSTRUCTION design with a centimeter/inch ruler and 1:20 and 1:50 architectural scales. Product Features Designed by TROIKA Design Werkstatt HB grade pencil tip Erasable, unbreakable, without sharpening. Centimeter/inch ruler, 1:20 m/1:50 m architectural scale, Exchangeable writing tip, / metal, matt, Black Centimeter and inch ruler Materials: aluminum/metal Replaceable tip Dimensions 5.78 x 0.40 x 0.40 Inches (147 x 10 x 10 mm) Weight 0.04 lbs. (16 g) Full color Gift Box