Black nickel toothed eyelet grommets. The washers have sharp claws (spikes) that dig into thick fabrics and leather, preventing horizontal movement. The surface after installation is flat, like a regular eyelet. 50 pieces each of the main body and washers. Eyelet: Umbrella diameter B = 22mm Outer hole diameter A = 13mm Inner hole diameter 11mm Height C = 7mm Washer: Diameter B = 22mm Outer hole diameter A = 13mm Inner hole diameter 12mm The washer has 7 teeth (claws). Made in Japan. These are leftovers from a custom order made by Yanagiba Bijo in Kuramae, Asakusa. These are being sold at a large discount due to being overstock. Although they are unused, they have not been individually inspected, so there may be small scratches. Please be aware of this. If you would like to change the quantity, please inquire in the comments section.