Mechanical pencils offer a yellow design that resembles the traditional yellow wood-case pencils and No. 2 lead that matches them. Certified by Scantron; these pencils are perfect for standardized tests. One mechanical pencil writes longer and equals 2-1/2 wood-case pencils in writing length. 0.9mm point size delivers less lead breakage and bolder lines. Design also includes a top plunger to easily advance the lead. Mechanical pencils are nonrefillable.