Characteristic: 1. WIDELY USED: Spring lock can be used for face shields, collars, shoelaces, belts, harnesses, backpacks, parachute cords, camping, hiking, wildlife survival accessories, etc. 2. METAL MATERIAL: The spring plug is made of the highest quality zinc alloy, not easy to break, very strong and durable, can be used for a long time. 3. STRONG SPRINGS: The double hole cord lock ma strong springs that prevent the rope or cord from slipping, keeping the rope locked and secure. 4. EASY TO TIGHTEN: Metal zamki string attach to the cord and can be clamped without the use of knots, ideal for outdoor activities. 5. PRACTICAL AND CONVENIENT: Zamki allow climbers to quickly secure their camping clothing and equipment at low temperatures when wearing thick gloves on their fingers. . 30PCS METAL SPRING LOCKS PER STRING Specification: Item Type: Spring Cable Lock Material: Zinc alloy Usage: The rope lock spring stop is suitable for all kinds of drawstrings and different types of lin, such as shoe laces, backpack straps, pants, such as hooded jackets, laundry bags, sportswear, tents, etc. . 30PCS METAL SPRING LOCKS PER STRING List of packages: 30x Spring-loaded cord lock . 30PCS METAL SPRING LOCKS PER STRING . 30PCS METAL SPRING LOCKS PER STRING