Enhanced Bearing System:Double sealed bearings in the lift spindle, height adjustment mechanism (actuated through two gear boxes), and Cam Lock guarantee exceptional longevity and smooth operation. Designed to handle even the heaviest routers on the market, the Excel Ii effortlessly raises and lowers with precision.Patented Tensioning Feature:Our lifts incorporate a patented tensioning feature that eliminates backlash while adding the right amount of resistance to the spindle's rotation. This minimizes vibration from thread clearance and prevents unintended spindle movement during routing.Dedicated Cam Lock:Going beyond the patented tensioning feature, we've added a dedicated locking mechanism for heavy-duty, long-term routing tasks. Easily accessible from the same location as the crank handle, a simple twist secures the Excel Ii firmly in place, providing confidence when making height adjustments.