IRWIN STRAIT-LINE SPEEDLINE PRO 100-ft Chalk Reel is easy fill and lock top makes refills clean and fast making it perfect for your DIY projects.  The 3:1 gear ratio rewinds 3X faster than traditional chalk line reels and the IRWIN STRAIT-LINE SPEEDLINE PRO 100-ft Chalk Reel contains 100-ft of hi-tensile line that is 2.5X stronger than traditional chalk line reels for fewer breaks.  The robust steel handle  has a large ergonomic clutch for increased durability, strength, and torque.  The lightweight ABS housing withstands jobsite wear and tear for all of your projects.