SE
From Spydiewiki
SE is an acronym for Serrated Edge or Spyder Edge. Spyderco's two-step serration pattern of one large and two small serrations. This pattern increases the cutting edge by 24%. Spyderco is using a pattern of 1 large and two smaller serrations. The sole exception is the C27 Jess Horn.
Some interesting information about serrations may be found in this thread on Spyderco forums.
For more background and information on serrations, also see the article in the Spyderco byte - December 2016 Newsletter
