1000 Sets of #4 type grommets feature 1/2 hole setting size, 7/8 outer diameter and 1/4 height, suitable for manual and semi-automatic grommet machines that are using #4 dies Made of sturdy metal material, durable and not easy to crack and deform Easy to be fixed on the dies of grommet machines and grommet tools Grommets are applied for setting on leather, canvas, corrugated paper, etc 1000 grommet sets are ideal for clothing and leather manufacture; applicable for belts, bags, shoes, etc