Features: Safe Material – These chalk holders are made of high-quality matte plastic. Non-toxic and tasteless. Suitable for children, students, teachers, and office workers. Fits most standard chalk sizes. Keeps chalk securely in place. No More Chalk Dust on Hands – Keep your hands clean with this adjustable chalk holder. Avoid chalk dust, especially beneficial for children, teachers, and those with sensitive skin. Makes Writing and Drawing Easier – These chalk holders are easy to use. Simply press the top and insert the chalk. This will hold the chalk firmly in place. Remove the chalk only when in use. Set of Colored Chalk Holders + Case – Includes 10 children's chalk holders in 5 colors. All chalk guards are in a plastic box. Each chalk holder measures 9.3cm x 1.5cm. (Chalk not included.) Versatile Set – These plastic chalk holders keep chalk securely in place. Suitable for children, students, teachers, and office workers. Fits most standard chalk sizes. Perfect for schools, offices, and homes. Size: 9.3cm x 1.5cm (3.7 inches x 0.6 inches) Fits most standard chalk sizes. Recommended for diameters from 0.35" to 0.5" (0.76cm to 1.27cm). Package Contents: 10 x Chalk Holders 1 x Storage Box (Chalk not included) Tips: These adjustable chalk holders are not automatic. You need to press the top and manually remove the chalk. If a chalk breaks and gets stuck in the holder, insert a small object (e.g., a wooden stick) into the hole above, and the stuck chalk will come out immediately. If you use chalk in your daily life, trust me, these teacher chalk holders are more useful than you might think. Satisfaction Guarantee: Thank you for your purchase. Kreidehalter's quality and packaging come first. Notes and Measures: Contact us if you have any questions about product quality or our service; we will respond to your messages within 48 hours.