Product Description Heavy-duty case is constructed of durable aluminum alloy. Twisted cotton line holds more chalk for multiple line strikes Steel plated hook and large grip anchor ring provide better holding power. Retractable self-locking metal handle allows reel to be used as a plumb bob. Refillable case holds approximately 2 ounces of marking chalk. Comes with 4 ounces of blue-colored marking chalk. IRWIN Tools STRAIT-LINE 64499 Aluminum Refillable Chalk Line Reel with 4-Ounce Chalk, 100-foot, Blue (64499) From the Manufacturer 100-foot Chalk Line Reel with 4 ounces of Blue Chalk Combo, a precision made, leak-proof, practically damage proof, self-chalking reel that provides a sharp, clear line every time, features a convenient slide-fill opening for no mess chalk refill. Reel is designed to double as a plumb bob. Irwin tools are made of only the finest materials, manufactured to exacting tolerances.