The Original Kershaw Zing In Black! Not to be confused with the Kershaw Zing 1735SS The Difference between the two is a lot the original is made with Sandvik 14c28n While The SS version is mov138cr. This Knife has a fast deployment for a manual folder and has a wonder "pop" when deployed. The Knife had 3d Machine Grooves in the blade for aesthetic looks. with ramped up thumb studs and a pronounced flipper makes this a winner in my collection This si the second knife R.J. Martin Has designed with 3D Machine Grooves The Knife is called the Groove that is a larger folder and can be seen in my collection.