Safe material - These chalk holders are made of high-quality matte plastic. Non-toxic and odorless. Suitable for children, students, teachers, and office workers. Fits most standard chalk sizes. Keep chalk secure No more chalk dust on hands - Keep hands clean with the adjustable chalk holder when using chalk. Stay away from chalk dust, especially for children, teachers, and people with sensitive skin Make writing and drawing easier - These chalk holders are easy to use. Press the top and insert chalk. This keeps chalk in place. Remove chalk only when needed Set with colored chalk + holder - Includes 10 chalk holders in 5 colors. All chalk holders come in a plastic box. Each chalk holder size is 9.3 cm x 1.5 cm (3.7 in x 0.6 in) (Without chalk) Versatile set - These plastic chalk holders keep chalk in place. Suitable for children, students, teachers, and office workers. Fits most standard chalk sizes. Perfect for schools, offices, and home