StillCool Chalk Holders for Teachers, Chalk Holder Blackboard Adjustable Chalk Clip Set, Come with 5 White Chalks StillCool Chalk Holderscan effectively protect your hands from direct contact with chalk avoiding drying and cracking, also avoid the child put the chalks in the mouth. High-level MaterialsHigh-level non-toxic ABS material, with good impact resistance, heat resistance, low temperature resistance, chemical resistance. In all kinds of environments, you can also feel at ease using it for a long time. Portable SizeEach chalk holder measures 3.7 x 0.6 inch (9.5 x 1.5 cm), standard size fits kids and teachers, even anybody. Wide ApplicabilityThese chalk holders are adjustable and convenient to use and clean, great for for school, office, meeting room and industrial use. 18 months warranty18 months of product warranty are provided free of charge. Package includes 5 different colors chalk holders, each holder has a white chalk inside.