This mountain bike crank locking screw features an integrated hollow crank fixing design and is made of metal, ensuring reliable quality. It is suitable for men, women, and users with a neutral preference, catering to a wide range of people. The specification is M6x18 per set, and each set contains 2 pieces, which can meet the need for fixing the bike crank. Whether you are riding daily or exploring the mountains, it can provide a stable crank locking effect for your bike, making your ride safer and smoother. This product has an authorized private brand. Although it is not an imported product, its quality is by no means inferior. It is not designed for children and is an ideal accessory for adult mountain bikes. It is favored by consumers in many regions around the world. The main sales regions cover Europe, South America, Southeast Asia, North America, Northeast Asia, and the Middle East. It is also well - received on many major e - commerce platforms such as eBay, Amazon, Wish, AliExpress, independent websites, Lazada, and Shopee.