What length of tape should I buy?

5 m is the general-purpose standard. Furniture and interior work manage with 3 m, while site and external work want 8-10 m. Plots and setting out call for a 30-50 m closed-case long tape.

Why does blade width matter?

A wider blade reaches further unsupported: about 1.5-2 m at 16 mm, 3-4 m at 25 mm. Working alone that decides the tool — but a wide blade also means a bigger case and more bulk in the pocket.

The end hook moves. Is it broken?

No. It is designed to slide by its own thickness: it pulls out for external measurements and pushes in for internal ones, so zero stays true either way. A jammed or bent hook, on the other hand, gives a constant error.

How much difference is there between class I and class II?

The allowance accumulates per metre. Over 8 metres class II permits roughly 1.9 mm of deviation against about 0.9 mm for class I, and in furniture and joinery that difference shows.

What is a magnetic hook for?

It grips steel and iron so no second person is needed to hold the blade. It is used for single-handed measuring in steel erection, ducting and pipework.

Are nylon-coated blades really longer lived?

The first 15-20 cm of blade goes in and out most and wears fastest. Nylon or polyamide coating delays both abrasion and the loss of the printed markings there, and under heavy use the difference is obvious.

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Tape Measures

The tape measure is the most bought and most lost measuring tool, so the choice is made on durability as much as accuracy. This page covers the accuracy class, why blade width matters, what standout means and how the end hook is supposed to work. The catalogue holds over 110 products from Milwaukee, BTS, Hassan, Fisco, GFB, BMI and Bosch.

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Accuracy class and length

The I, II or III beside the CE mark on the blade is the legal accuracy class. Class II is the site and workshop standard; furniture, joinery and precision fitting call for class I. Because the allowance grows per metre, the gap between classes reaches several millimetres over an 8 or 10 metre run.

Length follows the scale of the work: 3 m for furniture and interiors, 5 m as the general-purpose standard, 8 and 10 m for site and external work. Closed-case long tapes of 30-50 m are for plots, fencing and rough setting out, with either fibreglass or steel blades.

Length	Blade width	Where
3 m	16 mm	Furniture, interiors, pocket
5 m	19 - 25 mm	General purpose — the most common
8 m	25 - 27 mm	Site, external work
10 m	25 - 32 mm	Long spans, steelwork
30 - 50 m	13 mm (cased)	Plots, setting out, fencing

Standout: how far the blade reaches unsupported

Standout is how far the blade carries its own weight before it buckles, and it is the feature that matters most when working alone. A wider, more deeply curved blade reaches further: roughly 1.5-2 m on a 16 mm blade, 3-4 m on 25 mm, and beyond 4 m on reinforced 27 mm blades.

The cost is bulk. A wide blade means a bigger case and a tape that no longer sits comfortably in a pocket. For a fitter working alone the wide blade is right; for a tape carried all day, 16-19 mm is the more usable choice.

What decides the blade's life is its coating. The first 15-20 cm take the most wear, and nylon or polyamide coated blades last markedly longer there. Stainless blades are the choice in wet and salt-laden environments.

End hook, magnets and case

A loose end hook is not a fault: it slides by exactly its own thickness, so it pulls out for an external measurement and pushes in for an internal one, keeping zero true in both. A hook that is jammed or bent measures wrong every single time.

A magnetic hook grips steel sections, box profile and channel, which is what makes single-handed measuring possible in steel erection and pipework. Double-hook (stud) models let you both pull and push between studs.

On the case, a rubber overmould buys drop resistance, while a belt clip and lanyard loop keep the tape in place when working at height. Slim-cased models give a smaller body for the same length and are built to be carried in a pocket.

Hook movement: keeps zero true inside and out — it is not a fault.
Magnetic hook: one-person measuring on steel sections and channel.
Nylon-coated blade: extends life over the first 20 cm, where wear concentrates.
Stainless blade: wet, salty and outdoor work.

Frequently Asked Questions

What length of tape should I buy?
5 m is the general-purpose standard. Furniture and interior work manage with 3 m, while site and external work want 8-10 m. Plots and setting out call for a 30-50 m closed-case long tape.
Why does blade width matter?
A wider blade reaches further unsupported: about 1.5-2 m at 16 mm, 3-4 m at 25 mm. Working alone that decides the tool — but a wide blade also means a bigger case and more bulk in the pocket.
The end hook moves. Is it broken?
No. It is designed to slide by its own thickness: it pulls out for external measurements and pushes in for internal ones, so zero stays true either way. A jammed or bent hook, on the other hand, gives a constant error.
How much difference is there between class I and class II?
The allowance accumulates per metre. Over 8 metres class II permits roughly 1.9 mm of deviation against about 0.9 mm for class I, and in furniture and joinery that difference shows.
What is a magnetic hook for?
It grips steel and iron so no second person is needed to hold the blade. It is used for single-handed measuring in steel erection, ducting and pipework.
Are nylon-coated blades really longer lived?
The first 15-20 cm of blade goes in and out most and wears fastest. Nylon or polyamide coating delays both abrasion and the loss of the printed markings there, and under heavy use the difference is obvious.