Irwin Chalk Line Refill Red 227g – Straitline Powder

This Irwin Straitline chalk powder refill is a 227g red cartridge designed to replenish standard chalk line tools for marking straight lines on construction and electrical installation sites. The fine-grade chalk powder provides crisp, visible lines on concrete, timber, and drywall surfaces, ensuring accuracy for layout work and alignment tasks. Ideal for electricians, builders, and contractors who rely on chalk lines for daily marking operations.