Designed to keep you moving through your project, the Irwin Strait-Line Mach Chalk-Reel Collection is packed with time-saving and job-impacting features. There’s no time wasted marking lines with the easy fill and lock top, hi-tensile line, and 3:1 gear ratio, which rewinds line 3 times faster than traditional chalk reels. Available with or without refill chalk bottle so you will be prepared for precise cuts and accurate measurements.