These spikes use reinforced stainless steel for both the claws and the chain. This is a premium version with non-slip processing on the rubber sole. This listing is for one set (for both feet) of spikes, suitable for mountaineering boot sizes 19cm-21cm, with a storage bag. We ship from Monday to Friday, excluding weekends and holidays. Orders paid by 12:00 PM will be shipped the same day. Shipping is from Okayama Prefecture. ↓ Regions expected to arrive in 1 day from the shipping date ↓ Kyushu, Shikoku, Chugoku region, Kinki, and the Chubu region (Nagano, Toyama, Yamanashi) ↓ Regions expected to arrive in 2 days from the shipping date ↓ All of Kanto, Niigata, and Tohoku ↓ Regions expected to arrive in 3 or more days from the shipping date ↓ Okinawa, Hokkaido, and remote islands Similar to snow chains for car tires, chains are very effective on snow. In addition to that grip, this model has 11 spikes arranged in appropriate locations for high safety. With only the chain and spikes on the sole of the shoe, it's less slippery and easier to walk on snow. These spikes are new and have been carefully inspected in Japan. You can use them with confidence. Product Description These are 11-claw spikes. They are very convenient for everyday life and mountaineering, such as in sudden snow. They are light crampons that are helpful for low mountains in winter and snowfields in summer. The band part uses a soft yet durable material, and you can easily put them on like wearing socks over your shoes. Because they are connected by a chain, they can accommodate various sole shapes. Having one of these chain spikes is reassuring at any time. Color: Black Compatible Mountaineering Boot Size: 19-21cm * Depending on the shape of the shoe (especially ski boots), they may not fit within the compatible size. Material: Chain, Claws: Stainless steel Band: Elastomer Made in China How to Attach: 1. Insert the toe side of the shoe into the loop of the belt. 2. Pull and cover the heel side so that there is no slack in the chain. If there is slack, it will feel loose. 3. Adjust the position of the spikes on the sole of the shoe if they are too close to the edge. There is no difference between the left and right spikes, but there is a front and back direction. The front and back are marked with "BACK" on the heel side of the front belt.