Kuźnia Ostrów Wielkopolski Sp. z o.o. manufactures the following components and subassemblies for the rolling stock:
- Screw couplings
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- screw coupling 850 kN type UIC/ERRI with deferred handle

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- screw coupling 850 kN type UIC/ERRI with globular handle

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- screw coupling 850 kN type PKP

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- screw coupling 850 kN type DB

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- screw coupling 850 kN type 5A

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- Draw hooks
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- draw hook type A 1000 kN

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- draw hook type B 1000 kN

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- draw hook type B 1500 kN

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- hooks for various types of locomotives

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- Pull rods
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- pull rod 1000 kN various types

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- pull rod 1500 kN various types

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- Pull rod devices
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- pull rod device 1 MN

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- Brake triangles
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- brake triangle 60 kN with outside link

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- brake triangle 60 kN with inside link

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- brake triangle 120 kN with outside link

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- brake triangle 120 kN with inside link

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