The 8.75 PRO-XL is our most-powerful ever self-propelled DR Trimmer/Mower. If high weeds and tough growth are your problems, this is the model for you. But the PRO-XL is easy to handle, thanks to its 14" diameter wheels, so you can tackle any trimming job with it too, even in tight quarters. Variable speed drive allows you to easily adjust your speed as you go. DR’s new variable speed drive system lets you choose the trimming and mowing speed that’s right for you. When the going is easy, charge ahead at full speed. For tougher conditions or precise trimming work, slow down and take your time.