'Other' Constructional and Allied Systems Info & Downloads
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)
as EITECH/CONSTRUCTION
China
2004 to in production in 2022 and continuing
Steel
M4
push fit
----
25 (see comment *1)
50 (approximately)
10.0
4.2 (see comment *2)
---
4.0
Nuts: hexagonal
Bolts: pan (crosshead)
Steel with a Bright Zinc plated finish
6.9
6.5(see comment *3)
Comments
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 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)