This is a 5/16" left-hand bump knob replacement for the Oregon 55-994 Bump and Go Trimmer Head. Oregon replacement parts are built to meet or exceed OEM standards.

• 5/16" Left-hand thread
• Used for Oregon 55-994 Bump and Go Trimmer Head
• Bump knob for curved-shaft trimmers with extended spindle shafts
• This part ensures proper fit and performance to maintain the life of your equipment

WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

This part fits:Homelite - A97910A, Homelite - UP03209, Laser - 87040, Rotary - 8521, Stens - 385-649, Homelite - UP06764, Homelite - DA97910A