Comprehensive Color Selection: Receive a set of four welder pencils, along with five boxes of color-matched refills. The set comes with a total of 60 refills, ensuring you can complete a variety of marking tasks in different environments and materials. and Ergonomic Construction: Made of sturdy plastic and metal, these pencils are rust-resistant and break-resistant for long-lasting durability. Designed with a striped grip, these pens provide a non-slip, comfortable hold during extended use in any building or construction environment. Optimal Size for Precision: Each engineering pen is 15 cm/5.91 inches long and comes with a sturdy clip for easy carrying, while the included 2 mm/0.08 inch thick refills are 12.5 cm/4.92 inches long for precise, detailed marking on a variety of surfaces. User-Friendly Mechanism: Designed with a self-pressing feature for immediate use, these mechanical engineering pencils come with a pen clip for easy carrying and access. Choose from a variety of refill colors for enhanced visibility against different backgrounds. Versatile Uses for Various Industries: Tailored for such as , architects, designers, students and office workers, these pencils are ideal for marking on wood, metal, tile, paper, cement and other surfaces, supporting a wide range of projects. The refills are shipped randomly with flat and pointed tips, don't accept the specified Colour:Photo Color Material:Plastic + Metal Package Contents: 4 x mark pen (4 colors) 60 x replace the pen core (4 color) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.