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X-Tech (Metal Construction) Construction Sets

X-Tech metal construction sets had identical parts to Eitech Construction. It is classified as a Polylong(1a) type system. It was manufactured in China. Thought to date from the 2000s and 2010s. Note that although the set boxes had the name 'X-Tech' on them, the instructions were headed 'Metal Construction'.

Manufacturer / Distributor

An unknown company 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.

Three small X-Tech sets - Plane, Dragster, Jeep.
(Added 04/07/2020)

The X-Tech set - Dragster.
(Added 04/07/2020)

The X-Tech (Metal Construction) instruction leaflet for a Dragster.

The X-Tech set - Tank.
(Added 04/07/2020)