100' Bold Replacement Line

The Milwaukee 48-22-3989 is a 100 ft bold replacement chalk line, used to replace the braided line inside Milwaukee bold-line chalk reels.

Key Features:

• 100 ft high-strength braided line
• 1.5 mm thickness for durability and snap strength
• Designed specifically for Milwaukee bold-line chalk reels
• Resistant to fraying and heavy jobsite wear
• Built for consistent chalk pickup and clean snap lines

Performance Highlights:

• Maintains a strong, visible snap line over long runs
• Braided construction improves abrasion resistance vs basic string line
• Designed to reduce line breakage during heavy use or rough pulls
• Works in dusty, outdoor, and high-abuse environments

What it’s used for:

• Replacing worn chalk reel line
• Framing layout and long straight reference lines
• Concrete, masonry, and general construction marking
• Roofing and exterior layout work