Protects your chainring from obstacles by mounting to ISCG05 tabs- Offers great protection for all kind of chainrings, especially direct mount (spiderless) where you can't mount a regular 4 bolt bashring- Use with any chainring from 26T-32T oval or 26T-34T round- Plate and bolts: CNC machined 7075 Txxx Aluminum. Bash: Special polymer with long glass and carbon fibers for increased impact strength