Tajima's 10-1/2 oz. Bottle Fluorescent Micro Chalk, Yellow is designed to deliver dependable marking performance without excessive clogging in compatible chalk reels. The fine-grain formulation helps the chalk transfer evenly to the line, supporting clean and consistent snaps across drywall, lumber, concrete and other suitable surfaces. This fluorescent marking chalk is particularly useful for construction layout, carpentry, remodeling and other applications where highly visible temporary reference lines are required. Its bottle format also makes replenishing a chalk reel straightforward, helping keep layout tools ready for repeated use on the jobsite.