OCW-790 052 513 (WC232168)

Precision Cutting Attachment.  Allows You to Precision Cut Your Tungsten Electrode to a Fixed Length: 15/32" (12mm), 33/64" (13mm), 19/32" (15.5mm) and 43/64" (17mm). 

For ESG Plus, ESG Plus², George Fisher, & Weldcraft Triad Tungsten Electrode Grinders.