IRWIN Tools STRAIT-LINE MACH6 6X High-Speed Refillable Chalk Line Reel with 4-ounce Chalk, 100-foot, Red Chalk (2031316DS) 6:1 gear ratio retracts 6 times faster than traditional chalk reels. Durable metal drive gear. Incredibly tough nylon/polyester braided line. Wide pronged metal hook clips easily to belts and rigs. Aluminum case and metal handle. Retractable self-locking metal handle allows reel to be used as a plumb bob. Refillable case holds approximately 2 ounces of chalk. Includes 4 ounces of red chalk.