Micron Round Steel Grommets are made out of Heavy-Duty iron material. The inner diameter measurement is 1 1/2" and the outer diameter measurement is 2 1/2".  We also offer the attaching needs for this type of Grommets. These Grommets can be applied with Hand Press Machinery or Hand Tools. 

With Micron Machines and hand tools very easy to set these Grommets. Please use our machines model, M-3 Machine, MC-20 Machine or MH-1 Machine, Round Grommets hand tools.