Material: Steel grade 5.8. Key ring 1.4310, bright. Version: Indexing pin hardened, ground, black oxidized. Note: Indexing plungers are used to prevent any change in locking position due to lateral forces. A new locking position can only be set after the pin has been disengaged. The key ring is also suitable for automatic actuation of the indexing plunger by e.g. program-controlled pneumatic cylinder or by remote control using Bowden cables.