1. Material: chrome-molybdenum steel 2. Applicable to: mountain and road bikes 3. Features: protects crankarms from damage when changing pedals, extends the axle core to reduce strain when leveraging 4. 20mm diameter per pair, inner hole fits hexagonal wrenches up to 8mm 5. Protects chainrings and crank threads, allowing for multiple pedal changes without worrying about crank thread wear 6. Increased pedal spacing ensures stable installation, resists loosening, and is durable. Single-side width increased by 20mm 7. Strengthened structure for guaranteed safety. Disassembly and assembly require a 15mm/18mm wrench or adjustable wrench 8. Left and right treads for easy installation, with distinct English markings on the treads 9. Fully CNC-machined and processed using an automated thread rolling machine for a tight and precise thread pitch 10. Weight: Approximately 54g
