Irwin

Irwin produces marking and layout tools for construction and installation. Irwin Strait-Line permanent staining chalk is used with chalk line reels to create long-lasting layout marks on outdoor jobsites. This marking chalk is formulated for exterior use and can withstand harsh weather and extended wear while remaining visible for weeks. Permanent staining chalk helps create clear reference lines on concrete, wood, and other surfaces without the need for spray sealant.