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AtoZ (Metal Mechanic) Construction Sets

AtoZ (Metal Mechanic) construction sets have parts similar to both Eitech Construction and Meccano and are classified as Polylong(1a) type sets. AtoZ is the brand name of Padgett Bros who are a Major Importer & Wholesale Distributor of Toys, Nursery Goods, Pre School Toys, Branded Items, Arts & Crafts, Tools, Housewares, Garden, Pet Products & Grotto Toys. They have a website https://www.padgettatoz.co.uk/BOYS/METAL-MECHANICS-463 from which the pictures of additional sets shown below were taken in summer 2020. Whilst the boxes all have the AtoZ logo on them, the instruction leaflets are obviously generic as the do not have any brand name on them. They are almost certainly manufactured in China. Judging by the various styles of sets they may well come from more than one manufacturer. Some of their sets just have there logo and name details stuck on over other information (probably for a different company). Interestingly the AtoZ model of a Spitfire, the IWM model of a Hawker Hurricane and the Haynes model of a Spitfire all appear to be the same model.

Manufacturer / Distributor

AtoZ is a brand name of Padgett Bros, UK, who imported the sets from China.

Info from the Metal Constructional Systems Database for POLYLONG [1a] (Ref:PLY1a)

System Type
2004 to in production in 2022 and continuing
Boss Type
push fit
Boss Thread
Diametrical Pitch of Gears
25 (see comment *1)
No. of Parts in System
50 (approximately)
Hole Pitch (Spacing) (mm)
Diameter of holes in Strips(mm)
4.2 (see comment *2)
Diameter of the Bore in Bosses(mm)
Diameter of Axle Rods(mm)
Types of Nuts and Bolts
Nuts: hexagonal
Bolts: pan (crosshead)
Material/Finish of Nuts and Bolts
Steel with a Bright Zinc plated finish
Size of the Nuts across Flats (mm)
Bolt diameter (mm)
6.5(see comment *3)

Various Sets (see separate list) from one or more unknown Chinese makers. Most parts as Eitech/Construction but some others. *1 Mod.1 & finer for Motor/Gear Unit.. *2 Square holes in some RCEE sets. *3 6.1 & 7.4 also reported.

Pages from the 'Other Systems Newsletter' which contain information on this system are shown below. They can also be downloaded to your computer if desired here

NOTE : If the 'Other Systems Newsletter' pages for POLYLONG [1a] do not appear in the window below, then refresh the page.

The report can be zoomed into, made full screen or downloaded as a pdf document by using the controls provided

Below there are manuals/leaflets which can be downloaded by clicking on the appropriate image.

An AtoZ instruction leaflet for the Campervan construction set.
(Added 03/07/20)

Photos of the AtoZ Campervan construction set.
(Added 03/07/20)

An AtoZ instruction leaflet for the Spitfire construction set.
(Added 03/07/20)

Photos of the AtoZ Spitfire construction set.
(Added 03/07/20)

An instruction leaflet for an AtoZ Metal Mechanic set. From the manual front cover it looks as though this set is also sold under the Metal DIY Model name.
(Added 03/07/20)

Photos of an AtoZ Metal Mechanic set. Note that the coloured parts in this set were plastic.
(Added 03/07/20)

Photos of various AtoZ Metal Mechanic and other metal construction sets taken from their website in July 2020.
(Added 03/07/20)