C.S.Osborne & Co. No. SS-4. Made in the USA . CNC machined from high grade tool steel, Properly machined and hardened.
No. SS-4 sets size 4 grommets. Size 4 grommets have a 1/2" diameter hole when set in, 1.062" out side diameter, and 0.374" Length under flange . Hole punch not included
. Grommet dies and cutters should be used with an Osborne rawhide hammer or wooden mallet, not with a steel hammer. We recommend C.S.Osborne & Co. No. 395 rawhide hammers for this purpose. Mallet Not Included.