This is a 30 metre self-chalking chalk line — a marking tool used to lay down long, accurate straight lines quickly on surfaces such as timber, plaster, concrete and paving. The unit combines a 30 m length of pre-waxed braid with an internal chalk reservoir so the line automatically deposits chalk as it is snapped, making it ideal for transferring reference lines over long runs without repeated re-chalking.

The chalk line features a robust, impact-resistant ABS case with a matt finish and an ergonomic rewind crank. The line itself is a braided polyester (PET) construction, chosen for low stretch and high tensile performance, and runs on a plain-bearing spool for smooth pay-out and rewind. The end hook is zinc-plated steel for improved corrosion resistance and secure anchoring; a recessed metal clip allows temporary fixing to edges. The unit is refillable and accepts standard powdered chalk in white, blue or red. Manufactured under BS EN ISO 9001 quality management arrangements, the tool meets common trade expectations for durability and repeatability.

Typical applications include carpentry and joinery for setting out cuts and angles, bricklaying and blockwork to mark course lines, tiling and floor-laying to establish reference runs, landscaping for aligning edgings, and general site use where rapid, visible layout marks are required. It is suited to site operatives, tradespeople and keen DIYers working indoors or outdoors where quick line re-marking is needed.

Key benefits are straightforward: the braided polyester line gives low elongation and consistent snap marks; the zinc-plated hook and metal components resist corrosion in typical site environments; and the refillable chalk reservoir reduces downtime compared with standard chalk reels. The case protects the line from abrasion and the rewind mechanism keeps the line tangle-free. Compatibility with standard powdered chalks and the availability of different chalk colours add flexibility for different substrates and visibility requirements.

Duchy Fasteners stocks this Draper Tools DR11528 30 m self-chalking chalk line and supplies replacement chalk and spare hooks. We hold a range of lengths and pack quantities — please contact us for available sizes and bulk pack options.