The Milwaukee Eight engine returns to the single camshaft design, which requires a new tool for correct and accurate replacement of the camshaft inner needle bearing. Compared to the O.E.M. tool, this remover uses the proven "JIMS style" remover collet as well as JIMS fine threaded installation driver. We've incorporated a new removal hole that works as a window to let you see what you are doing while using the tool. The JIMS tool holds tighter tolerances which allows for a more precise installation depth.