IRWIN Tools STRAIT-LINE 64497 Aluminum Refillable Chalk Line Reel with 4-Ounce Chalk, 100-foot, Orange (64497) 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 orange-colored marking chalk.