The IRWIN STRAIT-LINE Speedline PRO Chalk Reel features an Easy Fill & Lock Top that provides a wide opening for increased speed and visibility when filling the reel or accessing internals. The top locks securely with a turn to prevent unwanted spills. The 100′ hi-tensile line is 2.5X stronger than traditional chalk reels for fewer breaks on rough, abrasive surfaces. The reel has a 3:1 gear ratio to rewind the line 3X faster than traditional chalk reels.