First-rate, commercial-grade, wood-cased pencils are perfect for schools, architects, engineers, contractors or anyone who needs a dependable pencil. Bonded core of No. 2.5 medium lead delivers break-resistant writing. High-quality, latex-free eraser is designed for easy, clean corrections. Pencils are PMA certified nontoxic. Barrels are made from fine-quality woods from sustained-yield forests.