● Set includes 30 spikes and an installation key & handle. ● Spikes are also sold separately for ¥1200 per 10 pieces. ・Installation Key: #4000, compatible studs #1000, ¥900 @ Yahoo ・Spikes: Best Grip Japan studs #1000, ¥5500/50 pieces @ Yahoo Suitable for mountain bike/trekking shoes, sneakers, and shoes for fishing on rocky terrain. Previously used on Arc'teryx Norvan4 Nivalis for snow and ice running, photos 3 & 4. ・Handle: ¥600, purchased at DCM Technical Info: Size Diameter x Length -------- 6.0 x 8.5 mm Length protruding from tread surface -- 2.3 mm Insertion depth from tread surface ------ 6.2 mm Tip diameter of protruding part --------- 1.7 mm Official Reference: https://www.powersportsimport.com/product-page/studs-1000-50%E6%9C%AC Spike Reference: https://store.shopping.yahoo.co.jp/bestgrip-jp/1000.html Installation Key Reference: https://store.shopping.yahoo.co.jp/bestgrip-jp/4000.html Best Grip, Spikes, Best Grip Japan, Grip, Tungsten Carbide, Carbide Spikes, Spikes, Trail Running, Running, Marathon, Triathlon, Ultramarathon, Studs, Studs, Non-slip, Non-slip, Grip Power, Outdoor, Sole, Rocky Terrain, Fishing, Fishing, Fishing Shoes, Fishing Boots, For Fishing, Shoes, Installation Key, Anti-slip, Crampons, Spikes for Snowy Roads, Spike Pins, Needle Pins, Pyramid Pins, Double Parallel, Ice Spikes, Snow, Icy Roads, Shoe Spikes, Shoe Non-slip Pins, Shoe Soles, Snow Country, Snowy Roads, Snow, Ice Surface, Icy, Frozen, Chains Spikes