The Stanley Tools Chalk Refill in Red is a 225g professional-grade chalk specifically formulated for external masonry work where permanent marking is required. This red chalk variant is indelible, making it the ideal choice for long-lasting reference lines on brickwork, blockwork, and other masonry surfaces where marks need to withstand weather exposure and site conditions. Designed for use with chalk line reels, this high-grade chalk delivers bold, highly visible red lines that won't fade quick
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