b'Patented cutting head with 8 carbide- 45tipped cutting teeth spin at 88 mph and take 360 bites per second!Carbide-tipped teeth havegrinding positions for added durability.Our TOW KIT comes standard on our PRO XL model and is available as an option on our PREMIER and PRO models. It lets you hitch your DR Stump Grinder to an ATV, UTV, or riding mower with either a pin-hitch or ball hitch. TAKE IT WHERE YOU NEED IT! Tow Kit allows you to hitch up to a riding mower or ATV.Our PRO XLSP model is SELFPROPELLED thanks to our commercial Walk your Self- grade dual shaft transmission, with built in di erential, which makes Propelled model easilyfor smooth, easy, self-propelled transport between job sites.around your property.'