Refills Included : Our set comes equipped with additional leads in black, yellow, and red, ensuring you have ample supplies for your ongoing projects. Deep Hole Marker : The 45mm elongated tip enables effortless marking in tight corners and deep holes, a must-have for construction professionals. Stronger Solid Lead : Boasting a 2.8mm thickness, our leads are stronger than conventional options, reducing breakages and increasing your work's efficiency. Mechanical Pencils : Designed for architects and construction workers alike, these pencils feature a mechanical mechanism for smooth, continuous marking. Architects' Choice : Tailored to meet the demands of architects, these pencils offer precision, durability, and convenience in one package. Our Refills Included Carpenter Pencils are the architect's dream come true. Designed to tackle the unique challenges of construction and drafting, these pencils come with extra leads for uninterrupted creativity. The deep hole marker feature ensures no space goes unmarked, while the stronger solid lead offers unparalleled durability. Perfect for both the field and the drawing board, our mechanical pencils are your new go-to for professional marking.