The Irwin? STRAIT-LINE? Speedline? PRO Chalk reel features an easy-fill and 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 1/4 turn to prevent unwanted spills. The 100 ft 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.