Lunies Chalk Holder with Storage Hard Case - Blackboard Adjustable Chalk Clip Set (3.7 x 0.6 Inch), 5 Bright Color It protects your hands from direct contact with chalk avoiding drying and cracking Blackboard adjustable chalk clip set for school & office drawing board It protects chalk from breaking & can be used for long term Includes:1 Chalk holder case with 5 pcs Chalk holder 3.7 x 0.6 Inch (9.5 x 1.5 cm)