OX Pro 400mm Combination Square

The OX Pro 400mm combination square is a measuring and marking tool built for tradespeople and DIY users, with a 400mm stainless steel blade and a heavy duty die-cast metal head. It measures and marks, verifies 90 and 45 degree angles, and checks level and flatness with the built-in spirit level. The hardened scriber stores in the handle for marking materials, and the etched metric graduations resist wear and corrosion.

Key Features

• 400mm stainless steel rule with etched metric graduations
• Heavy duty die-cast metal head for strength and stability
• Precision machined head for accurate 90 and 45 degree references
• Built-in spirit level for quick levelling checks
• Hardened scriber stored in the handle
• Resistant to wear and corrosion

Specifications

• Brand: OX Tools
• Series: PRO
• Blade: 400mm stainless steel
• Graduations: etched metric
• Head: die-cast metal
• Angles: 90 and 45 degree references
• Extras: spirit level, hardened scriber

Applications

• Marking and measuring on wood, metal and plastic
• Verifying 90 and 45 degree angles
• Checking level and flatness on surfaces and edges
• Scrbing lines for cutting

What You Need To Complete The Job

Pair the square with a pack of carpenters pencils for marking, and add a long level to the kit for setting out. For a more compact version, the OX 305mm combination square is the shorter option. More measuring gear is under Carpentry Tools.

Frequently Asked Questions

What is a combination square used for?

A combination square measures, marks and checks angles. The rule slides in the head to set a depth or height, the head references 90 and 45 degrees, and the spirit level checks that a surface is level. It is one of the most versatile layout tools in a kit.

Why is the blade stainless steel?

Stainless steel resists rust and corrosion, so the rule stays accurate and the etched graduations stay readable in site conditions. It is a blade built to survive the workshop and the weather on a job site.

How do I use the scriber?

The hardened scriber stores in the handle and pulls out for marking. You run the point along the rule to score a line on metal or hard material, which gives a finer mark than a pencil and does not wash off.

What does the spirit level do on a square?

The built-in spirit level lets you check that a surface or edge is level while the square is set against it, which saves carrying a separate level for quick checks. It is a convenience that makes the combination square a true all in one tool.

How do I keep the square accurate?

Keep the blade and head clean and check the lock knob holds the blade firmly before each job. Store it where the blade will not get knocked, and the stainless rule will keep its straight edge and readable graduations for years.