GREENFIELD, Calif (KION-TV)-- A free catalytic converter engraving workshop will be held on Saturday July 16 on 930 Walnut Avenue. There are a few spots left for the workshop which will run from 8:00 a.m. to 4:00 p.m. Residents will need to bring identification and vehicle registration. For more information about the event call Sgt. Gutierrez at (831) 717-8194.