Description:Features:100% brand new and high qualityGood workmanship, sturdy and durable to use. Save size, easy to install. Durable and handy, long service life. Ideal for domestic, commercial or industrial use. An ideal replacement for a damaged part. Replaces the bump knob on trimmers. Compatible with small impact heads. Bump knob non-scythe head replaces the worn bump knob on trimmers. Built durably and easy to install. Includes screw mounting. Specification:Optional Type: 1# Left HandSize: M8x13mmColor: BlackQuantity: 1pcNote:Transition: 1cm=10mm=0.39 inchNo retail package. Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Included: 1 x Bump Knob (Other accessories demo in the picture are not included.)