Die-cast aluminium chalk line with 30 metres of string. Lightweight, durable and ready to use straight from the pack. A reliable site essential for marking straight lines on floors, walls and ceilings.
The Proforce Aluminium Chalk Line gives you a simple, effective way to mark perfectly straight lines across floors, walls, ceilings and sheet materials. Whether you are setting out stud walls, aligning floor tiles or marking cut lines on plywood, a chalk line does the job faster and more accurately than any tape measure and pencil method. This one comes ready to work with 30 metres of line already fitted.
The body is made from die-cast aluminium, which keeps the weight down while standing up to the kind of treatment tools get on a working site. Unlike plastic chalk lines that crack when dropped or stepped on, aluminium holds its shape and keeps working. The compact design fits easily in a tool belt or pocket, so it is always to hand when you need it.
How a chalk line earns its place in your kit
Setting out work accurately is half the battle on most jobs. A chalk line lets you snap a visible reference line across any surface in seconds. Fill the reservoir with chalk powder, hook the end to your starting point, walk the line out to where you need it, pull it taut and snap. The line transfers the chalk to the surface in a crisp, straight mark that stays visible while you work.
Thirty metres of line covers most domestic and light commercial applications comfortably. You can mark the full length of a room in one go, set out multiple parallel lines for decking boards, or run a level reference around an entire space. The line rewinds into the body for storage, keeping everything tidy between uses.
Practical points worth knowing
Chalk lines work best on dry, relatively clean surfaces. Dusty concrete or damp timber will give you a fainter mark, so a quick brush or wipe before snapping helps. Blue chalk shows up well on most surfaces and brushes off easily when you are done. Red chalk is more permanent and better suited to outdoor work or situations where the mark needs to survive foot traffic and weather.
The hook at the end of the line can catch on a nail, screw or the edge of a sheet. If you are working alone, a small offcut with a nail through it makes a decent anchor point. With two people, one holds the hook while the other pulls and snaps.
This is a tool that does one thing well. It will not replace a laser level for precision work over long distances, but for everyday setting out and marking, it handles the job quickly and reliably. The aluminium body means it should last through years of site use without falling apart, and at this price point, there is no reason not to have one in the van.
Pro Tip: Keep a separate chalk line loaded with red chalk for outdoor work. Red marks stay visible through rain and foot traffic, while blue wipes off too easily on exposed sites.
Chalk lines are used across almost every trade for marking straight reference lines. Carpenters use them for setting out stud walls, marking cut lines on sheet materials and aligning flooring. Tilers rely on them for establishing grid lines before laying floor or wall tiles. Bricklayers and groundworkers snap lines for setting out foundations and courses. Decorators mark ceiling lines and dado rails. Roofers use them on felt and membrane installations. Any job that needs a straight line over a distance longer than your spirit level is a job for a chalk line.
Best For
Setting out stud walls and partitions
Marking cut lines on plywood and boards
Aligning floor and wall tiles
Establishing level reference lines
Compatible Materials
Concrete and screed
Plywood and timber boards
Plasterboard and blockwork
Roofing felt and membranes
Key Features
Die-cast aluminium body
30 metres of line included
Compact and pocket-friendly
Rewind mechanism for tidy storage
Not suitable for: Not ideal for precision setting out over very long distances where a laser level would give better accuracy. Chalk marks may not show clearly on wet or heavily dusty surfaces without cleaning first.
Fill the body with chalk powder through the filler hole, leaving some space for the powder to coat the line as it rewinds. Hook the line end to a fixed point or have a second person hold it. Walk the line out to your end point, pull it taut and hold it firmly against the surface. Lift the line vertically and release it sharply to snap a chalk mark onto the surface below.
Fill the reservoir with chalk powder, leaving room for the line to move freely
Hook the line end to your starting point or have someone hold it
Walk the line out and pull it tight against the surface
Lift the line straight up and snap it down sharply to transfer the chalk
Rewind the line into the body when finished
Does this chalk line come with chalk powder included?
No, the chalk line comes with 30 metres of line fitted but you will need to purchase chalk powder separately. Blue chalk is the most common choice for general indoor work.
Can I replace the line if it breaks or wears out?
Yes, replacement chalk line string is widely available and can be wound onto the reel when the original line wears out or snaps.
What is the difference between blue and red chalk?
Blue chalk brushes off surfaces easily and is best for indoor work where you want the marks to disappear after. Red chalk is semi-permanent and better for outdoor use or where marks need to survive longer.
The Proforce Chalk Line features a die-cast aluminium body for durability and reduced weight compared to steel alternatives. The internal reel holds 30 metres of braided line designed to pick up and transfer chalk powder effectively. A spring-loaded rewind mechanism returns the line to the body for storage. The hooked end allows the line to be anchored to edges, nails or fixings for single-person use.
Body Material
Die-cast aluminium
Line Length
30 metres
Line Type
Braided
Rewind
Spring-loaded mechanism
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