DEWALT Cast Aluminum Chalk This DEWALT Cast Aluminum Reel Red Chalk is 100 ft. It has a die cast aluminum body for durability and to protect its twisted cotton line of reel. The felt gasket helps to distribute chalk uniformly. It can be used as a plumb bob because of its tear-drop shape. The Chalk reel is able to withstand abuse and resist corrosion because of its stainless steel hook and crank arm. DEWALT products are built to last. Heavy-duty aluminum die-cast body Felt gasket Stainless steel hook and crank arm Tear-drop shape