Thank you for viewing from among many options. ★★★★★★★★★★★★★★★★★ Secure your glasses firmly and softly for active lifestyles! - Product Name: Mega Rock F - Purpose: Eyeglass Lock - Made in: Japan - Features: Easy to install, compatible with various sizes - Price: 630 yen (tax included) - Color: Dark Brown ◉ Simply insert into the temples of your glasses. ◉ Compatible with various sizes. ◉ Removable as needed! ◉ Includes adjusters for thin frames. ◉ Comes with a convenient holder for portability! ※ Used only once after purchase. Cleaned. ※ Please purchase only after understanding the above.