Irwin Hanson 65101 Standard Marking Chalk Blue 5 lb Refill

The Irwin Hanson 65101 is a 5-pound supply of standard blue marking chalk designed for use with chalk line reels. This fine-ground chalk lays down a bright, high-visibility blue line on a wide range of surfaces, making it a reliable choice for layout work in construction, carpentry, flooring, roofing, and general contracting applications.

Key Features:

• 5 lb. supply — generous bulk quantity for extended jobsite use and frequent refills
• Bright blue color — provides excellent contrast and visibility on wood, concrete, drywall, and other common work surfaces
• Temporary marks — chalk lines can be wiped or brushed away, making it ideal for layout work where permanent marking is not desired
• Interior and exterior use — suitable for indoor and outdoor applications across a wide range of job types
• Fine-ground formula — flows smoothly through chalk line reels for consistent, clean lines
• Compatible with standard chalk line reels — works with most chalk reel designs for easy refilling

Whether you're snapping lines on a subfloor, laying out wall framing, or marking cuts on roofing materials, the Irwin Hanson 65101 blue chalk delivers the performance and visibility professionals depend on.