We're a strong supporter of the elegance and performance of Lift-and-Slide style fenestration- that's why we engineered this tool specifically to mill out the hardware track for these doors in one pass. Without this tool, an operator would have to mill out a series of repeated cuts which inevitably lead to less accuracy in the grooves, and would require tool and alignment changes for each groove. With our Lift-and-Slide cutter, your job is done in a fraction of the time and with the most precise cut you'll find anywhere.