OX Pro Chalk Line Reel 30m with 6:1 Gearbox

By OX Tools · Model: Pro Chalk Line 30m · Site Equipment & PPE

30m chalk line reel with a 6:1 rewind gear and locking mechanism for marking straight lines on floors, walls and ceilings.

30m Kevlar line for marking across large floor and wall areas
6:1 gear ratio for faster line rewind
Locking mechanism holds the line for solo use
Hook grips edges and corners
Aluminium body

Overview

The OX Pro Chalk Line is a site layout tool for marking straight lines across floors, walls and ceilings. A 6:1 gear rewinds the line faster than a plain reel, and the locking mechanism lets you hook the line to an edge and lock it taut before snapping.

In-Depth Look

A chalk line marks a long straight line on a floor, wall or ceiling. The OX Pro adds a geared rewind and a lock to the basic reel, which helps when you are snapping many lines during a layout session.

6:1 Gear

On a plain chalk line, the line is wound back by hand after every snap. The 6:1 ratio means the spool turns six times for each turn of the handle, so rewinding takes fewer turns.

Solo Working

The locking mechanism helps when you are working alone. Hook the end on a board edge, corner or nail, walk to the far end and lock the reel. The line stays taut, so you can position it and snap it cleanly.

Summary

The OX Pro Chalk Line Reel has a 30m Kevlar line, a 6:1 rewind gear, a locking mechanism and an aluminium body.

How It Compares

The OX Pro chalk line reel in this listing has a 30m Kevlar line and an aluminium body, according to retailers. A 6:1 planetary gear rewinds the line, a locking mechanism holds it, and a push-button clutch protects the gears when you pull the line out. A hook grips the edge of the work. A felt gasket helps the chalk coat the line evenly and limits spillage, per the maker. Listed packs come with a chalk refill, but check the pack for what is included.

Option	What it is	What to weigh up
Chalk line reel	A chalked line snapped onto a surface	Gives a physical line on the surface
Laser lines and cross-line lasers	A projected line	Suited to levelling and long visual lines
String line	A taut string between two points	Marks a line in the air rather than on the surface
Pencil and straight edge	A drawn line	Limited by the length of the straight edge
Tape and pencil marking	Marks placed at measured points	Needs joining up

For measuring and levelling, see the Stabila 196-2 spirit level, the Stanley FatMax tape measure and the Bosch GLL 2-15 G cross-line laser. Our guide to choosing site equipment has more.

Common Questions

How do I snap a straight line on my own? Hook the end, pull the line taut and lock it. Lift the line straight up and release it. Keep the line taut throughout.

What does a 6:1 gear ratio mean? About six turns of the spool for each turn of the handle, so the line rewinds faster.

Why is my line faint? Low chalk, damp chalk, a slack line or a rough surface can all cause it.

Can I use it on a wall and a ceiling? Yes, with a helper or a locking reel. Choose chalk that wipes off if you need to, and test an area. Permanent chalk exists, so check the chalk before using it on finished surfaces.

Do I need a laser instead? A laser suits levelling and long visual lines. Chalk gives a physical line on a surface.

What does the clutch do? The push-button clutch protects the gears when you pull the line out, according to retailers. The locking mechanism holds the line once it is drawn out.

Can I refill the chalk? The listed packs come with a chalk refill, but check the pack for what is included. The felt gasket helps the chalk coat the line evenly and limits spillage, per the maker.

Does the exact pack matter? Yes. Pack contents differ between listings, so check what the pack includes before you buy, and do not rely on the name alone. Retailers describe the line as Kevlar and the body as aluminium for the 30m version listed here.

Where does a chalk line fit alongside the other layout tools? Use a tape measure to set the marks, snap the line between them, and use a level or laser to check the line is where you want it. The line is a physical mark on the surface, while a laser projects a line you can only see.

Specifications
Line Length	30m
Line Material	Kevlar
Gearbox Ratio	6:1
Body Material	Aluminium
Locking	Yes

Who It's For

Carpenters and joiners marking stud wall positions and floor layouts
Tilers setting out grid lines and datum lines on floors
Roofers, dry liners and general builders needing straight reference lines on site

Pros & Cons

Pros

6:1 gear for faster rewind
Locking mechanism for solo use
30m line reaches across most rooms and work areas
Aluminium body

Cons

Gear mechanism adds parts compared with a simple reel
Chalk needs refilling during long layout sessions
Keep the line off rough surfaces before snapping to avoid losing chalk

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Buying Guides

How to Choose Site Equipment and PPE

Works Well With

Tools

Stabila 196-2 Spirit Level (120cm)

A 3-vial spirit level with vials locked into the body to resist movement, used by bricklayers, joiners and tilers. Any level can be knocked out of true by a hard drop, so check it.

Stabila

Tools

Stanley FatMax 8m Tape Measure

8m tape measure with a 32mm wide blade, Mylar coating, Blade Armor on the first part of the blade and metric and imperial markings.

Stanley