Extra heavy-duty chalk box with an integrated handle release™, premium braided nylon/polyester line and matching felt applicator, a wide fill neck, and an integrated case gasket / non-slip grip.
・Premium braided line creates an Extra Bold 0.04 in ( 1.0 mm ) line
・Heavy-duty aluminum case integrated with non-slip grip surface
・Large gasket-sealed refill port
・Double-speed winding mechanism