EASY INSTALLATION， Comes with a sole holder, can be easily put on the sole of your shoes, firm and reliable, not easy to fall off. SPARK GRINDING DESIGN, Equipped with flint and sole fixer, sparks are generated through the friction between the sole and the ground, which can be used in outdoor activities such as pedal bike motorcycle dazzling show. Cool and beautiful， the spark grinding ground effect makes you more eye-catching and show your personality in outdoor activities. SAFE AND RELIABLE, Made of material, and waterproof, ensuring stability and reliability for long time use. Outdoor Flint Sole Spark Flint Set brings you a new outdoor experience. Equipped with flint and sole holder, through the friction between the sole and the ground, you can generate sparks can be used in riding bicycles and motorcycles and other activities. Lightweight and easy to carry. Divided into two specifications 1 portion pack and 2 portion pack (each portion contains a shoe cover and 4 spark stones) Simple installation, firm and reliable, not easy to fall off. The effect of spark grinding makes you more eye-catching and show your personality in outdoor activities. Made of material, and waterproof, ensuring stability and reliability for long time use. Enjoy the fun of outdoor life while staying safe and reliable.