EXTRA-BOLD SNAP LINE - 1.0 mm braided nylon line produces clean, clear, accurate snaps for the precise layout results. FAST LINE RETRIEVAL - 5-gear, fast wind systems allows for quick line retrieval, saving you time on any busy jobsite DIE-CAST ALUMINUM CASE - High capacity, premium aluminium body with elastomer grip for added durability QUICK SPOOL LINE - Integrated handle release allows chalk line to free-spool when pressed and automatically re-engages when winding EASY FILL NECK - Large neck makes loading Tajima Micro Chalk and Snap Line Dye easy and mess free