Irwin Strait-Line Mach6 Chalk line 30m (Old Version)

DescriptionChalk lines differ in several useful ways. Choosing the right features improves accuracy and ease of use.Case and RewindBasic manual rewind: Simple and reliable.Fast-rewind/gear-drive: Reels in quickly after long pulls; helpful for frequent use.Clutch or brake: Controls line payout and tension, reducing tangles.String ThicknessThin line: Leaves a fine, precise mark; good for interior finish and tile layout.Standard line: Everyday use; balances visibility and accuracy.Thick line: High-visibility marks on rough or outdoor surfaces; less precise.String materialPolyester/nylon: Durable and less prone to fraying.Cotton/mixed fibers: Holds chalk well but may wear faster.Braided vs. twisted: Braided often lasts longer and sheds less fuzz.Chalk types and coloursBlue: General-purpose, typically removable; a safe default for most interior work.White: Low-stain option for delicate or finished surfaces and painting guides.Red: More permanent and weather-resistant; can stain drywall, wood, and concrete—use outdoors only if permanence is acceptable.Black: High contrast; often more stubborn to remove.Fluorescent colours: Increased visibility in low light or outdoors.Standard vs. permanent/dye-based: Permanent chalk resists weather and removal; use with caution.