Jointech SmartLift Pro Router Lift 9.25" x 11.75" Precision Router Lift for incremental accuracy of router bit height adjustments. Make router bit changes above the table without need for special wrenches. Ring Gear Design is sealed from saw dust - making SmartLift superior to other lifts. No belts, No chains, No pulleys! Spline Shaft turns sealed Ring Gear. Three 1/16" Pitch, Precision Rolled Lead Screws provide accuracy and unmatched repeatability.