1. Complete Set: The term "spare parts" suggests that it's a collection of screws or components related to the cylinder head, ensuring a comprehensive replacement or upgrade.

2. Compatibility: The spare parts are likely designed for specific models of Feinwerkbau air rifles, ensuring proper fit and function within the designated cylinder head system.

3. Precision Engineering: Feinwerkbau is known for precision engineering, and the spare screws are expected to be crafted with meticulous attention to detail to meet the brand's high standards.

4. Maintenance or Upgrade: The kit may be intended for routine maintenance or as an upgrade to enhance the performance of the cylinder head system.

5. User-friendly Installation: The spare parts may include user-friendly installation instructions to assist rifle owners in replacing or upgrading the cylinder head screws.

Hexagon socket head cap screw M5x25