Lumber Crayon Holder (WOOD) High quality wood holder can accommodate both crayons and markers for increased convenience. It can hold product that holds both round and hexagonal shapes. Walnut Crayon Holder has a metal chuck and a wrist strap hole for increased durability and functionality. Hard Lumber Crayons are extra-strong, long-lasting permanent markings crayons for marking wet or dry lumber, steel, felts, iron and concrete.