'Other' Constructional and Allied Systems Info & Downloads
Metal DIY Model Construction Sets
Metal DIY Model Construction Sets have parts to similar to Eitech Construction and are classified as a Polylong(1) type sets. The instructions were on the rear of the sets. The coloured parts were plastic. This is a set of four small single model Digger sets. They were made in China.
Info from the Metal Constructional Systems Database for POLYLONG 
2003 to in production in 2018 and continuing
25 (see comment *1)
4.2 (see comment *2)
Bolts: pan (crosshead)
Steel with a Bright Zinc plated finish
6.5(see comment *3)
Various Sets (see separate list) from Polylong & other makers. Most parts as CONSTRUCTION  but some others. *1 Mod.1 & finer for Motor/Gear Unit.. *2 Square holes in some RCEE sets, see TRONICO [a]. *3 6.1 & 7.4 also reported.
Below there are manuals/leaflets which can be downloaded by clicking on the appropriate image.
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