Secure base lock for sun visors: fixes sun visors firmly, prevents accidental sliding during cycling, protects the rider's sight, and improves overall performance. Ready to use and easy to install: these plates arrive prepared for immediate use, providing a convenient and fast upgrade. Engineered for visor protection: plates are designed to shield your helmet visors. Adaptable design for NEVA helmets: base design can be adapted to the sun visor base and is suitable for NEVA helmets without compatibility concerns. Compatibility and practicality: designed to work with sun visors and NEVA helmet models, offering reliable performance in everyday cycling. Use scenarios: Daily commuting on windy or fast rides: keeps the sun visor securely in place to prevent distraction and maintain clear sightlines. Quick retrofitting on NEVA helmets: a hassle upgrade to add secure sun visor support without matching issues. Outdoor activities with changing light: reliable visor stability when adjusting to different sun angles or weather conditions. Notes: Function: base lock secures sun visors, minimizes movement, and protects vision. Compatibility: specifically suitable for NEVA helmets and associated sun visor bases. Material and size details: not specified in the original description; these plates are designed for readytouse installation and compatibility with NEVA helmet sun visors.