This is a replacement lever and extruder plate for left hand Extruders. Lever and plate are CNC machined from 6061 billet aluminum, with weight reduction features. It will replace a stock plastic assembly that has tendency to warp over time from heat and force. This is a direct replacement, with no modification needed. Extruder Plate is designed with the 4mm hole for Flexible Filament Mod. Kit includes: CNC Machined Lever with high quality bearing, CNC Machined Plate, Set of Flat Socket Head Screws and Spring