Mizuno aluminum studs, a set of 16 studs for spikes, 18mm size. Spike wrench included. - Brand: Mizuno - Item Name: Aluminum Studs - Size: 18mm x 16 pieces - Price: ¥880 Thank you for viewing. The bag has been opened, but the studs were not used because the size was different, so the contents are new. Please take a close look at the photos, and I hope to deliver them to someone who needs them.