Oregon multi-surface marking crayons are designed for versatile writing and marking on a wide range of materials including wood, metal, stone, concrete, tiles, ceramic, plastic, and glass. Each pack contains 12 professional-grade marker crayons in white. The unique six-sided shape prevents rolling, ensuring stability during use. These crayons have a pencil diameter of 12mm and a length of 120mm, making them easy to handle. They are simple to use and produce easily visible marks on most surfaces, making them ideal for professionals such as tree surgeons, plumbers, builders, and carpenters. This pack includes 12 white crayons.